clean upvc windows

How to Clean uPVC Windows: Glass, Frames & More

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Keep your windows looking brand new with these simple cleaning tips

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 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’s our complete guide to cleaning every part of your uPVC windows — the glass, frames, seals, hinges and sills.

🧼 What You’ll Need:

  • Soft cloths or microfibre cloths
  • Warm soapy water (mild washing-up liquid works well)
  • 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)
spraying liquid detergent on window

Step 1: Clean the Glass

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 — it causes streaks.

using a soft cloth cleaning uPVC window frames

Step 2: Wash the uPVC Frames

Your white uPVC frames can attract grime over time — but don’t worry, it’s easy to clean.

How to do it:

  1. Mix warm water with a small amount of mild washing-up liquid.
  2. Use a non-abrasive sponge to gently wipe the frames.
  3. For stubborn marks, use a uPVC-specific cleaner or a paste of bicarbonate of soda.
  4. Rinse with clean water and dry with a soft cloth.

Avoid: Harsh chemicals, bleach, or abrasive scouring pads — they can damage the surface.

cleaning sash window rails

Step 3: Get Into the Hinges, Seals & Tracks

These hidden spots can collect dirt, leaves and even mould if left unchecked.

Hinges & Locks:

  • Use a small brush or toothbrush to loosen dirt.
  • Wipe clean and apply a tiny drop of light oil (like WD-40) to keep them moving smoothly.

Rubber Seals:

  • Gently clean with soapy water and avoid pulling or stretching.
  • Apply a little silicone spray to keep them supple and prevent cracking.

Window Tracks & Drainage Holes:

  • Remove debris with a vacuum or brush.
  • Check drainage holes at the bottom of the frames — if they’re blocked, gently clear them with a cotton bud or small stick.

Step 4: Finish with the Window Sills

Don’t forget the inside and outside window sills!

  • Clean with soapy water and a soft cloth.
  • Rinse and dry to prevent watermarks or mould buildup.

Bonus Tips:

  • Clean your uPVC windows twice a year as a minimum — more if you’re in a coastal or high-pollution area.
  • For extra shine, use a dry cloth to polish the frames once finished.
  • Installing blinds or curtains can help protect your frames from constant sun exposure, which can discolour white uPVC over time.

Clean your uPVC windows twice a year as a minimum — more if you’re in a coastal or high-pollution area.

For extra shine, use a dry cloth to polish the frames once finished.

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.