Cleaning Pella Low-E Glass Windows

I have Pella low-E glass windows, approximately 40 windows. To have them professionally cleaned is costing approximately $400. Due to the low-E glass they are difficult to clean. When I do it, if the sun shines in they look like they haven't been cleaned in ten years. Any suggestions would be welcomed. I hate to keep throwing away money on something that I could easily do if I could get good results.


Mary from Kiel, WI

March 2, 20090 found this helpful

Is this low-E on a glass panel that you can take out with clips? If so, you may have damaged the low-E coating if you are using products such as Windex to clean it. Cleaners that are ammonia- or alcohol based can cause permanent damage. Pella recommends a vinegar-based solution.

If the low-E glass is not removable then you aren't actually cleaning the low-E coating. When two pieces of glass are sealed together, the low-E is on the interior side of the glass and you wouldn't be able to touch it.

Owner's manual can be found here (the first link in the "Support Section"): ... upportcenter/Pages/Consultation.aspx

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March 2, 20090 found this helpful

Try spraying with white vinegar and water mixture, and use a squeegee.

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March 3, 20090 found this helpful

I don't have Pella but a less expensive brand of low E glass windows. I have found using a microfiber cloth with only water works the best and lasts the longest of anything I have tried and much cheaper than hiring a cleaning company. I use one cloth to wash and one to dry. My windows tilt in making it easier to clean the outside as well. I got my microfiber cloths for a dollar each and they clean everything around the house. Then throw them in the washer and they are ready to be used again.

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May 31, 20100 found this helpful

There are s few positives to paying a professional to clean your windows, one is the transferring of risk from you to a professional.

If you are not getting the results you are wanting and are using the right cleaning mixture there might be a few reasons.

1. Make sure you are using enough cleaner to suspend the particulate and film build-up. It might be necessary to clean a few times before buffing to a streak-free shine.

2. Degree of difficulty increases as temperatures gets warmer, cleaning in direct sunlight takes a lot of practice, patience and personal hydration.

Micro-fiber rags are the best choice. There are different types though, some are very absorbent and others are not absorbent at all. Use the absorbent ones for cleaning and the non-absorbent for polishing at the end.

Hope this is helpful.


Here is a link to an article I wrote that has recipes for vinegar based cleaners:

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October 16, 20120 found this helpful

Whatever you do, do NOT use ammonia on low E windows. Mine were permanently stained when a window-washer cleaned them with dishwashing detergent and ammonia mixed together. Then he didn't completely remove the solution. A few days later we noticed permanent stains on the windows in these areas. The manufacturers should put a warning label on low E windows. Do NOT use ammonia.

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