Polycarbonate and acrylic windshields show up on motorcycles, UTVs, snowmobiles, boats, RVs and aircraft, and they all share one weakness: they scratch and craze far more easily than automotive glass. Reach for a glass cleaner loaded with ammonia or harsh solvents and you can fog, yellow or micro-crack the surface permanently. The right cleaner lifts bugs, road film and fingerprints while staying gentle enough to protect the optical clarity you actually need to see through.
We worked through the most trusted plastic-safe cleaners on a bug-splattered Goldwing windshield, a dusty Polaris RZR half door and a hazed RV cap window. Below are the seven that cleaned the cleanest without dulling, smearing or leaving a greasy haze, ranked best first with honest weaknesses for each.
| Photo | Product | Score | Buy |
|---|---|---|---|
 |
Novus Plastic Clean & Shine #1 Best Overall Anti-static plastic polish and cleaner, 8 oz spray, ammonia-free |
9.5 | 🛒 Check Price |
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Plexus Plastic Cleaner Protectant & Polish Best for Motorcycle Shields Aerosol foaming cleaner and protectant, UV inhibitors, 13 oz |
9.3 | 🛒 Check Price |
 |
Meguiar's PlastX Clear Plastic Cleaner & Polish Best for Haze and Yellowing Cleaner and polish cream, micro-abrasive, 10 oz bottle |
9.1 | 🛒 Check Price |
 |
Honda Pro Honda Spray Cleaner & Polish Best Manufacturer Pick Spray cleaner and polish, plastic-safe, 12 oz bottle |
8.9 | 🛒 Check Price |
 |
Aircraft Windshield Cleaner by Prist (Polycarbonate Plastic Cleaner) Best Anti-Static Formula Anti-static plastic cleaner, ammonia-free, 8 oz spray |
8.7 | 🛒 Check Price |
 |
Stoner Invisible Glass with Bug Wash (Plastic Safe) Best for Bug Removal Foaming bug remover, ammonia-free, plastic-safe, 22 oz spray |
8.4 | 🛒 Check Price |
 |
Chemical Guys Inner Clean Plastic & Vinyl Cleaner Best All-Surface Value Plastic, vinyl and trim cleaner, anti-static, 16 oz spray |
8.1 | 🛒 Check Price |
1. Novus Plastic Clean & Shine #1: Best Overall
Novus #1 is the cleaner most plastic windshield makers, including Goldwing and aircraft canopy suppliers, actually point owners toward, and it earned the top spot in our testing. On a heavily bug-splattered touring windshield it released dried-on splatter with a light dwell and a microfiber wipe, with zero hazing or smearing afterward. The standout feature is the anti-static finish: panels we treated attracted noticeably less dust over the following week, which matters a lot on dark-tinted shields where dust shows.
The honest weakness is that it is purely a cleaner and shine product, not a repair one. If your windshield already has fine scratches or swirl marks, #1 cleans them but cannot fill or buff them out, so you will want to step up to Novus #2 for that. Treat it as your everyday maintenance cleaner and it is hard to beat.
- Cleans, shines and adds an anti-static coat in one wipe
- Ammonia-free formula safe on polycarbonate and acrylic
- Repels dust so the windshield stays cleaner longer
Pros: Genuinely safe on polycarbonate with no fogging or crazing; Anti-static layer cuts down dust buildup between cleans; A little goes a long way per panel
Cons: Will not remove deeper scratches without the #2 polish; Spray nozzle can mist wide and waste product
2. Plexus Plastic Cleaner Protectant & Polish: Best for Motorcycle Shields
Plexus is a favorite in the motorcycle and aviation worlds for a reason. The aerosol lays down a thick foam that clings to vertical and curved windshields instead of running straight off, so you get real dwell time on bug guts without re-spraying. After buffing, it leaves a slick protective film with UV inhibitors that helps the next batch of bugs and road film wipe away with far less effort. On our Goldwing shield it cleaned and protected in a single pass.
The trade-off is the aerosol format. You go through a can faster than an equivalent pump bottle, and if you lay down too much foam and do not wipe thoroughly, you can leave a faint streaky residue that needs a second dry-cloth pass. Use it sparingly and it is an outstanding shield-specific cleaner and protectant.
- Foaming aerosol clings to vertical windshields
- Leaves a UV-resistant protective layer
- Repels water, bugs and fingerprints after application
Pros: Foam stays put on vertical and curved shields; Protective coat makes the next bug cleanup easier; Trusted in aviation and motorsport for delicate plastics
Cons: Aerosol can runs out faster than pump bottles; Slight residue if you over-apply and underwipe
3. Meguiar's PlastX Clear Plastic Cleaner & Polish: Best for Haze and Yellowing
When a polycarbonate windshield has gone past dirty and into hazed, yellowed or lightly scratched, PlastX is the one we reached for. Its mild micro-abrasive cream cuts through oxidation and restores genuine optical clarity rather than just wiping the surface. On a sun-baked RV cap window that had gone milky, a few passes by hand brought back see-through clarity that no spray cleaner could deliver. It doubles as a headlight and gauge cluster restorer too.
The weakness is that this is a polish, not a quick cleaner. It takes real effort, a foam applicator and a couple of buffing passes, so it is not what you grab to knock off a few bugs before a ride. Keep it as your restoration step and pair it with a gentle spray cleaner for daily upkeep.
- Mild micro-abrasives remove haze and light scratches
- Restores clarity to yellowed or oxidized plastic
- Works by hand or with a dual-action polisher
Pros: Actually restores clarity to hazed and yellowed shields; Removes fine scratches glass cleaners cannot touch; Flexible across headlights, gauges and windshields
Cons: Takes more elbow grease than a spray cleaner; Not meant for everyday quick cleaning
4. Honda Pro Honda Spray Cleaner & Polish: Best Manufacturer Pick
Pro Honda’s spray cleaner and polish is the bottle many powersports owners keep on the bench because it is safe on the plastic windshield and the painted bodywork and chrome around it. That versatility is the appeal: one spray handles the whole machine without you swapping products and worrying which surface tolerates what. On a dusty RZR half door and the Goldwing shield it cleaned cleanly and left a light, non-greasy shine that did not attract fingerprints.
The honest limitation is that it is a generalist. It will not restore a heavily hazed or scratched shield the way a dedicated micro-abrasive polish does, and because it is often sold through dealers, stock can be inconsistent. As an everyday plastic-safe all-rounder, though, it earns its place.
- Plastic-safe spray engineered for powersports windshields
- Cleans painted, plastic and chrome surfaces
- Leaves a light protective shine without buildup
Pros: Genuinely safe across plastic shields and bodywork; One bottle handles the whole bike or UTV; Light shine without greasy residue
Cons: Less specialized than a dedicated polycarbonate polish; Availability can be hit or miss outside dealers
5. Aircraft Windshield Cleaner by Prist (Polycarbonate Plastic Cleaner): Best Anti-Static Formula
Borrowed straight from the aviation world, this Prist plastic cleaner is formulated for aircraft canopies and windscreens, which are nearly all soft acrylic and polycarbonate. That heritage means it is engineered from the ground up to be ammonia and solvent free, so there is no risk of crazing. Its anti-static performance is the highlight, leaving treated shields visibly resistant to dust and lint, which keeps a clear windshield looking clean longer on a garaged bike or RV.
The catch is that gentleness has a ceiling. On lightly soiled or fingerprinted shields it produces a flawless streak-free finish, but caked-on bug splatter needs a soak and sometimes a second product to break down first. As a finishing and anti-static cleaner it shines; as a heavy bug remover it is not the strongest in this group.
- Aviation-grade formula for canopies and windshields
- Strong anti-static action repels dust and lint
- Ammonia and solvent free to protect plastic
Pros: Aviation pedigree means it is gentle on soft plastics; Excellent anti-static dust repelling; Streak-free finish on clear shields
Cons: Best on light soiling, struggles with caked bugs; Smaller bottle for the cleaning power
6. Stoner Invisible Glass with Bug Wash (Plastic Safe): Best for Bug Removal
If your number one problem is bugs, this is the bug specialist of the group. Stoner’s foaming bug wash clings and dwells on dried-on splatter, breaking down the protein crust so it wipes away without scrubbing, which is exactly what saves a soft plastic shield from scratching. Critically for our use, it is ammonia-free, so it is safe on tinted polycarbonate where standard glass bug removers would risk hazing. The large bottle suits RV windshields and big touring fairings.
The limitation is scope. This is a cleaner and bug remover, full stop, with no protective or anti-static layer left behind, so bugs will stick again just as fast next ride. It can also streak on a clear shield if you let the foam flash off before buffing. Pair it with a protectant like Plexus and the two cover each other’s gaps.
- Foaming formula breaks down dried bug residue fast
- Ammonia-free so it is safe on tinted plastic
- Large bottle suited to RVs and big touring shields
Pros: Cuts through caked bug splatter quickly; Ammonia-free and safe on tint and plastic; Generous bottle size for big surfaces
Cons: Not a polish, leaves no protective layer; Can streak if not buffed before drying
7. Chemical Guys Inner Clean Plastic & Vinyl Cleaner: Best All-Surface Value
Chemical Guys Inner Clean is the value all-rounder here, a single spray that handles the plastic windshield plus the vinyl, trim and interior plastics around it. The anti-static finish keeps dust from resettling, and it dries to a clean matte look rather than the greasy sheen many trim sprays leave, so a treated shield stays clear and fingerprint-resistant. For owners who want one bottle for the whole machine and a tidy interior, the versatility is the draw.
The honest weakness is that it is tuned for trim and surfaces more than for crystal optical clarity, so on a windshield it is best after the heavy cleaning is already done. It is also only mildly effective against caked bug splatter and thick road film. As a light maintenance and anti-static spray with broad usefulness, it delivers, but it is not your bug buster.
- Cleans plastic, vinyl and trim with one formula
- Anti-static, dust-repelling finish
- Matte, non-greasy result with a clean scent
Pros: Adaptable across plastic shields, trim and interior; Anti-static finish keeps dust off; Pleasant scent and non-greasy matte finish
Cons: Formulated more for trim than optical clarity; Mild on heavy bug and road film
Frequently Asked Questions
Can I use regular glass cleaner like Windex on a polycarbonate windshield?
No, and this is the mistake that ruins the most plastic shields. Most standard glass cleaners contain ammonia and aggressive solvents that are fine on tempered glass but attack soft polycarbonate and acrylic, causing them to fog, yellow and eventually craze into fine spider-web cracks. Always choose a cleaner that is specifically labeled ammonia-free and plastic-safe, like the picks in this guide. Once a polycarbonate windshield crazes from ammonia exposure, the damage is permanent and the only fix is replacement.
Why does my polycarbonate windshield scratch so easily when I clean it?
Polycarbonate is far softer than glass, so any grit trapped in a dry cloth acts like sandpaper. The fix is technique as much as product. Rinse or soften debris first, let a foaming cleaner dwell so bugs and grit lift rather than drag, and only wipe with a clean, dedicated microfiber towel using light pressure in straight lines. Never use paper towels, shop rags or a cloth you have used on the ground. A protectant or anti-static cleaner helps because it keeps abrasive dust from settling in the first place.
What is the difference between a plastic cleaner and a plastic polish?
A cleaner, such as Novus #1 or Plexus, lifts dirt, bugs and fingerprints from the surface and often leaves a protective or anti-static layer, but it does not change the plastic itself. A polish, like Meguiar’s PlastX, contains mild micro-abrasives that actually remove a thin layer to take out haze, yellowing and fine scratches, restoring clarity. For day-to-day cleaning you want a cleaner. When a shield has gone milky or lightly scratched, you step up to a polish, then go back to the cleaner for upkeep.
How do I remove dried bugs from a plastic motorcycle windshield without scratching it?
Patience beats pressure. Spray a foaming, ammonia-free bug remover like Stoner Invisible Glass Bug Wash and let it dwell for a minute or two so the dried residue softens and releases on its own. You can also lay a wet microfiber soaked in the cleaner over stubborn spots for a few minutes. Then wipe gently with a clean microfiber, never scrubbing dry. The goal is to float the bug off rather than grind it across soft plastic, which is exactly how shields get scratched.
Will these cleaners work on tinted or coated polycarbonate windshields?
Yes, as long as you stick to ammonia-free, plastic-safe formulas, which every product in this guide is. Ammonia is the enemy of both the plastic and most tints and coatings, so an ammonia-free cleaner protects them both. For tinted shields, the anti-static picks like Novus #1 and the Prist aircraft cleaner are especially good because dust shows badly on dark tint and the anti-static layer keeps it cleaner. If your shield has a factory hard-coat or anti-fog layer, avoid abrasive polishes unless the shield is already hazed, since polishing can thin that coating.
Our Verdict
For nearly every polycarbonate windshield, Novus Plastic Clean & Shine #1 is our top pick: it cleans safely, leaves a dust-repelling anti-static layer and is the product plastic shield makers themselves recommend, with no fogging or crazing risk. Our runner up is the Plexus Plastic Cleaner Protectant & Polish, whose clinging aerosol foam and UV protective film make it the best choice for vertical and curved motorcycle shields. If your windshield has already gone hazed or yellow, add Meguiar’s PlastX to restore clarity, then keep it clean with either of the top two. Match the product to the job and your plastic windshield will stay clear, scratch-free and easy to see through for years.
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