Window cleaning here in Boulder can be a daunting task. However, if you’re not careful, it can also be time-consuming and frustrating. The wrong steps can make the process even more difficult, which is why it’s important to know what mistakes you should avoid when cleaning your windows.

Not making an appointment with a pro in the first place.

You can do a good job yourself, but you won’t get the same results as a professional window cleaner.



Pros have access to better cleaning products and equipment. They also have access to safety gear that will keep them from getting injured on the job. Window cleaners are trained in their field, and know how to use everything correctly without damaging your home or creating more work for themselves later down the road. In addition, they carry insurance so if there is an accident at your house while they are working, it doesn’t cost you anything extra to fix it (other than maybe buying new blinds).

Once all of that work has been done by professionals, there will still be some dirt left behind on the glass or frames. You’ll need to know how to clean those areas yourself if you want them to look as good as new again.

Vacuuming before washing.

Vacuuming before washing windows is a big mistake. Vacuuming can scratch your window, and it will leave behind dirt and dust that you don’t want to be cleaning off of your windows later on. Plus, it’s not even that necessary to vacuum first; the water from the washing process will get rid of any remaining dirt anyway!

If you want to remove the dust from your window before cleaning, use a clean, dry cloth instead. The cloth will be able to pick up any dirt particles without damaging the glass surface.

Using a rag on your glass — and not enough of them.

  • Use a microfiber cloth. As a cleaning tool, microfiber cloths are great for cleaning windows because they absorb moisture and they don’t leave streaks behind like rags or paper towels do. You should throw away the rag that you used to wash your car, not just because it looks gross, but also because its texture won’t work well on glass surfaces, and its the wrong cleaning material if it’s being used for other applications.
  • To help the end result be streak-free, use one clean cloth per window—and rinse in between sections. If there’s any dirt left on the window after using a microfiber cloth, use another clean piece of the same kind of material and rinse it off before moving onto another section of the window (for example top-left corner, top middle part, and so on).

Using the wrong abrasive cleaning products.

  • Using abrasive cleaning products.
  • Avoid using products that contain ammonia, bleach, acids, alcohol, or any other harsh chemicals. These can scratch the surface of your windows and make them look cloudy.

Also, be careful when using any product on tinted windows. Tinting is delicate, and certain products can make it peel or crack.

Scrubbing your windows — or squeezing the squeegee too hard.

  • Don’t scrub your windows. Never use a sponge or washcloth to clean glass. The suds that are created by the soap can easily scratch the surface of the window when you wipe it off.
  • Don’t squeeze too hard when using a squeegee. Although you need to push down on the squeegee, don’t do so aggressively; otherwise, you could damage your windows by putting too much pressure on them while they’re wet and fragile. Instead, gently pull back and forth over each area as if making figure eights with your hand—this will remove all moisture with minimal effort and risk of scratching up any surface materials.
  • Avoid using an old rag or cloth when wiping your windows — even if it looks clean! Your rags should be fresh every time you use them — try washing them after every few loads of laundry instead of once every week (or more) as most people do! Why? Because cloth fibers tend to break apart over time due to wear and tear from use; those tiny particles can then become lodged into cracks around window frames where no one else would notice them except for us here at Window King…and we want everyone’s home looking beautiful so that means being vigilant about maintaining proper hygiene standards when cleaning up around town!
Residential and Commercial Window Cleaning throughout Boulder CO

Cleaning on extremely hot or cold days.

There are some days to avoid maintaining your windows. Here’s a list of the days when you should not clean your windows:

  • On extremely hot days, the sun will dry out your window cleaner and make it ineffective, leaving streaky windows. It’s one of the most common mistakes when cleaning your windows.
  • On extremely cold days, the cold can crack your window cleaner bottle, or cause condensation to form on the glass that could obscure visibility.
  • When windy, it will blow dust particles into the air where they can be stuck to your freshly cleaned surfaces while they dry.
  • When raining or snowing, rainwater will dilute the effectiveness of all cleaners, and snowflakes may fall onto wet surfaces making them more difficult to see through until they melt away again.

Here are some other common window cleaning mistakes that make your windows look imperfect

Cleaning supplies

You should never use abrasive cleaning products on your windows. These types of chemicals can scratch the glass and make it harder to see through. Some people try to use a rag or squeegee, but these are not proper tools either. Rags can leave lint, and grime, and can stain or smudge if not properly cleaned. This can accumulate and that ends up in your eyes and on your clothes, while squeegees often leave streaks on the window surface, especially with hard water. If you want to avoid these mistakes and get a clean window every time you wash it, we recommend using paper towels with a liquid solution made for window cleaning. Also, consider using distilled water to prevent streaking and other residue left behind by improper cleaning.

Weather conditions and Using Too Much Cleaning Solution

It’s best to clean windows when it isn’t too hot or too cold outside because water freezes in cold weather and may cause damage if allowed inside during summer months when temperatures exceed 85 degrees Fahrenheit (29C). Windy days are also bad times because they can blow off any solution that has been applied to them. This could ruin nearby surfaces such as furniture or carpets if not cleaned up immediately after the application finishes drying off completely on its own accord within 24 hours at most before being touched again by humans since they contain toxic materials like ammonia which need special care when handling due to their corrosive nature causing serious damage if ingested accidentally over time through inhalation while working near these kinds of compounds without adequate safety gear available beforehand such as face masks designed specifically for toxic fumes. Choosing the ideal day to clean your windows is one of the most common issues overlooked by homeowners. Windows on a hot day are more difficult to clean and can be more challenging to deal with streaks and stains. Cleaning commercial windows compound this into being a much larger surface area and more numerous.

Please remember to do this only when it’s neither too hot nor too cold outside. If temperatures exceed 85 degrees Fahrenheit, windy days are also bad times because they can blow off any solution that has been applied to them which could ruin nearby surfaces such as furniture or carpets if not cleaned up immediately after the application finishes drying off completely on its own accord within 24 hours at most before being touched again by humans since they contain toxic materials like ammonia which need special care when handling due to their corrosive nature.

Conclusion – Clean windows Don’t Need to be a Struggle

If you’re going to be a DIY window cleaner, remember that it can be a big job. If you aren’t up for all the hard work, consider hiring a professional Window washing team like ours here in Boulder CO near you to do the job right whether it’s residential or commercial window cleaning services. But if you want to try your hand at cleaning windows at home, just make sure you follow our tips above so you end up with sparkling clean windows that don’t leave any streaks or spots behind!