How to Clean uPVC Window Frames and Glass: The Complete Guide

Keep your windows looking brand new with these simple cleaning tips for the best results.

uPVC windows are known for being low-maintenance – but that doesn’t mean they don’t need a little TLC now and again! Regular cleaning uPVC window frames and glass not only keeps them looking fresh but also helps extend their lifespan.

At Select Windows, we install high-quality uPVC windows built to last. But to help you get the most out of them, here is our complete guide on how to clean uPVC window frames and every other part of your window: the glass, seals, hinges, and sills.

What You’ll Need:

• Soft cloths or microfibre cloths
• Warm soapy water (mild washing-up liquid works well, or use a specific uPVC cleaner)
• Non-abrasive sponge or soft brush
• White vinegar or glass cleaner
• Old toothbrush or soft paintbrush (for tricky corners)
• Vacuum cleaner with brush attachment (optional)

Step 1: Clean the Glass for a Streak-Free Finish

Let’s start with the obvious bit – the glass.

How to do it:

1. Wipe down with a damp cloth to remove loose dust and dirt.
2. Use a glass cleaner or a solution of water and white vinegar.
3. Apply using a soft cloth or spray bottle and wipe in circular motions.
4. Buff dry with a clean microfibre cloth or newspaper for a streak-free shine.

Pro Tip: Don’t clean windows in direct sunlight – the heat causes the cleaner to dry too fast, which leads to streaks.

Step 2: How to Clean uPVC Window Frames (The White Parts)

Your white uPVC frames can attract grime and discolour over time, but learning how to clean uPVC window frames is simple. This step is essential for extending the life and look of your windows.

How to do it:

1. Mix warm water with a small amount of mild washing-up liquid. This is often the best cleaner for uPVC window frames for routine dirt.
2. Use a non-abrasive sponge to gently wipe the frames, working from top to bottom.
3. For Stubborn Stains (How to remove stains from uPVC window frames): For tough marks, you can use a uPVC-specific cleaner or a paste made of bicarbonate of soda and a little water. Apply the paste, leave for a few minutes, and then gently scrub.
4. Rinse thoroughly with clean water to remove all soap residue.
5. Dry with a soft cloth to prevent watermarks.

Avoid: Never use harsh chemicals, bleach, or abrasive scouring pads. These products can scratch and permanently damage the uPVC surface.

Step 3: Get Into the Hinges, Seals, and Tracks

These hidden spots are key to the window’s functionality and can collect dirt, leaves, and even mould if neglected.

Hinges & Locks:

• Use a small brush or toothbrush to loosen dirt around the mechanisms.
• Wipe clean and apply a tiny drop of light oil (like WD-40 on uPVC windows) to the moving parts to keep them lubricated and operating smoothly.

Rubber Seals:

• Gently clean with soapy water and avoid pulling or stretching the rubber.
• Apply a little silicone spray to keep them supple, prevent cracking, and maintain an effective seal.

Window Tracks & Drainage Holes:

• Remove loose debris with a vacuum cleaner brush attachment or a soft brush.
• Check the drainage holes at the bottom of the frames – if they’re blocked, gently clear them with a cotton bud or small stick to ensure water can escape.

Step 4: Finish with the Window Sills

Don’t forget the inside and outside window sills!

• Clean uPVC window frames and sills thoroughly with soapy water and a soft cloth.
• Rinse and dry to prevent watermarks or mould build-up, especially on interior sills.

Bonus Cleaning Tips:

• Frequency: Clean your uPVC windows twice a year as a minimum – more if you are in a coastal or high-pollution area where salt and soot build up faster.
• Polish: For extra shine, use a dry, soft cloth to polish the frames once they are completely dry.
• Protection: Installing blinds or curtains can help protect your frames from constant, direct sun exposure, which can cause white uPVC to discolour over many years.

Need Replacement Windows?

If your uPVC windows are looking tired or you’re dealing with draughts, misted glass or damage – it might be time to upgrade.

Select Windows offers a wide range of energy-efficient, secure and stylish uPVC windows tailored to your home. 📞 Get in touch today for a free quote or expert advice.