10 Window Cleaning Mistakes to Avoid (And What to Do Instead)

Window cleaning might seem easy, but if done incorrectly, it can actually harm your glass and frames. Many Sydney homeowners make small mistakes that lead to streaks, scratches, or long-term window damage. As a trusted pressure washing and window cleaning company in Sydney, Blastoise Pressure Wash has seen it all.

Let’s look at the most common window cleaning mistakes and how to avoid them for perfect, crystal-clear windows.

1.Using Dirty or Contaminated Water

Reusing dirty water just spreads grime and can scratch glass. Always start with fresh water, especially for final rinses. If your water looks cloudy, replace it.
💡 Pro tip: Use filtered or deionized water for a spotless finish — a technique used in professional window cleaning services across Sydney.

2.Cleaning in Direct Sunlight

Sydney’s sunny days can cause cleaning solutions to dry too fast, leaving streaks. Clean your windows early morning or late afternoon for best results.

3.Skipping Frames and Sills

Your window frames and sills also collect dust and grime. Neglecting them can prevent smooth operation and cause build-up. Always wipe them thoroughly before finishing.

4.Using the Wrong Cloth or Towel

Avoid old rags — they leave lint. Use microfiber cloths designed for glass cleaning. They’re affordable, reusable, and effective.

5.Not Using a Squeegee

A squeegee ensures a streak-free shine and removes excess moisture evenly. Professionals rely on them for that perfect finish.

6.Using Harsh Chemicals

Harsh cleaning agents can damage your glass or seals. Choose pH-neutral cleaners safe for both residential and commercial windows.

7.Ignoring Interior Windows

Both sides matter! Many people only clean the exterior glass. For complete clarity, clean inside and out — you’ll see the difference instantly.

8.Forgetting High Windows

Upper-floor windows collect just as much grime. Use safe extension poles or hire professionals for high window cleaning to avoid injury.

9.Pressure Washing the Windows

Never use a pressure washer directly on glass — it can crack panes or force water into seals.
Instead, check out our guide: How Often Should You Soft Wash Your House in Sydney to learn the correct cleaning techniques for delicate surfaces.

10.Not Hiring a Professional When You Should

Professional window cleaners have the right equipment, cleaning solutions, and safety gear to get the job done efficiently.
💡 Tip: When in doubt, hire a local window and pressure cleaning expert in Sydney like Blastoise Pressure Wash for spotless, damage-free windows.

Conclusion

Avoiding these window cleaning mistakes will save you time, protect your glass, and keep your home shining. Whether you’re cleaning your windows yourself or prefer a professional touch, following these simple steps ensures your Sydney home always looks its best.

👉 Need expert help? Contact Blastoise Pressure Wash today for window cleaning and house washing services in Sydney, Castle Hill, Pennant Hills, and Warriewood.