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Cleaning Polycarbonate Greenhouse Panels Without Scratching Them
Keeping your greenhouse panels clean helps your plants get the sunlight they need. Over time, dust, algae, and mineral spots can build up and reduce light transmission. But if you clean the panels the wrong way, you can leave scratches or damage the UV coating.
This guide will show you exactly how to clean polycarbonate greenhouse panels safely and effectively, whether you own a Riverstone Industries Greenhouse or any model with twin-wall polycarbonate panels.
Key Takeaways
- Use only soft microfiber cloths or sponges and mild soap.
- Rinse panels before washing to prevent scratches.
- Clean using long strokes, not circular motions.
- Avoid harsh chemicals, rough brushes, and pressure washers.
- Rinse with distilled water for a streak-free finish.
- Clean your panels two to three times a year for the best clarity.
Why Proper Cleaning Matters
Polycarbonate is strong but sensitive to abrasives. Using harsh chemicals or rough cloths can scratch the surface or wear down its UV protection. Regular gentle cleaning keeps panels clear, improves light flow, and extends the life of your greenhouse.
Tools and Materials You’ll Need
What You’ll Need:
- Soft microfiber cloths or clean sponges (avoid scrub pads)
- Large soft-bristled brush or rubber-edged squeegee
- Mild dish soap or gentle car-wash solution
- Bucket of warm water (not hot)
- Garden hose with a soft spray nozzle
- Distilled water for the final rinse
- Optional: ladder, gloves, and a soft-bristle broom for high sections
Avoid Using:
- Ammonia-based glass cleaners
- Abrasive powders or scrubbing sponges
- Pressure washers
- Paper towels or rough rags
- Blades or scrapers
Step-by-Step: Cleaning Polycarbonate Greenhouse Panels
Step 1: Pick the Right Day to Clean
Clean your greenhouse on a cool, cloudy day. Sunlight dries soap too quickly and leaves streaks. Avoid windy conditions that can blow dust onto wet panels.
Step 2: Rinse Off Loose Dirt
Use a gentle spray from a garden hose to wash away dust, pollen, and debris. Start from the top and work down. Do not use a high-pressure nozzle, as this can flex or crack the panels.
Step 3: Mix a Mild Cleaning Solution
In a bucket, add a few drops of dish soap to warm water. Mix gently so it is slightly soapy but not foamy. Too much soap leaves residue and streaks.
Step 4: Gently Wash the Panels
Dip your cloth or sponge into the soapy water and wipe each panel using long, straight strokes. Avoid circular scrubbing. For stuck-on dirt or sap, hold the wet cloth against it for a minute before wiping again.
Step 5: Clean Between Twin Walls (If Accessible)
If you own a greenhouse with removable panels, such as a Riverstone MONT, you can clean between them occasionally. Use low-pressure air or water to flush out dust. Let them dry fully before reinstalling.
Step 6: Rinse Thoroughly
After washing, rinse with clean water before the soap dries. Use distilled water for the final rinse if your area has hard water. This helps prevent mineral spots.
Step 7: Dry the Panels
Wipe each section dry with a soft microfiber cloth, or let the panels air dry. If you air dry, make sure the water drains downward and away from the frame.
Step 8: Inspect and Maintain
Once dry, inspect your panels for scratches or dull areas. For small marks, apply a polycarbonate-safe plastic polish. Clean your panels two or three times per year to maintain light clarity and appearance.
Prevention Is Best When It Comes to Buildup
- Use gravel or mulch around the greenhouse base to reduce mud splashing.
- Keep nearby plants trimmed to limit pollen and sap.
- Use roof vents or fans to reduce humidity inside and prevent algae.
- Rinse your panels lightly every month to avoid heavy buildup.
Have any questions or would like to place an order? We'd love to help! Chat with our friendly customer service team by calling 1-844-945-3625, chatting in on our website or email us at customersupport@wildoaktrail.com. We look forward to hearing from you!
Frequently Asked Questions
How often should I clean my greenhouse panels?
Clean every 4 to 6 months, or more often in dusty or humid areas.
Can I use vinegar to clean polycarbonate panels?
No. Vinegar can damage the UV coating and cause clouding.
What soap is safe for polycarbonate?
Use mild dish soap or car-wash detergent labeled safe for plastics.
Can I use a pressure washer?
No. The pressure can warp or crack the panels.
How do I remove algae spots?
Soak the area with soapy water, then gently wipe with a soft cloth.
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