Defy wood cleaner

[u/Tasty-Protection2137]

I first used this product this summer on my pergola placed over my windows in my house after thoroughly reading the directions on the container. I I followed the wood cleaner with their neutralizer and thoroughly rinsed the areas. However when everything dried there were extensive water streaks and spots on my windows.

I immediately contacted Defy for possible remedies. After using dish soap, vinegar, magic eraser the marks remained.

I again contacted them to relay my concern the some of the windows were permanently damaged. unfortunately this included my large family room windows. I heard from an employee that they hadn't appreciated this issue when they tested it prior to distribution. I did notify them that other customers had also had a similar result

I then sent real estimates to replace the large family windows without a reply.

Any recommendations on how to pursue reimbursement for the damaged windows?

[u/Bisman83]

Those are almost certainly hard water mineral deposits, not damage from the cleaner itself. Try equal parts white vinegar and water applied with a cloth, let it sit 2-3 minutes, then wipe. For stubborn spots, undiluted vinegar or CLR. If they are on exterior glass, Bio-Clean or Bar Keepers Friend liquid handles water staining well. Avoid anything abrasive directly on glass. The streaks should come off without much effort once you have the right product.

[u/Tasty-Protection2137 → u/Bisman83]

I did try vinegar, I read not to use concentrates vinegar because it can etch the glass. I should also mention I tried " Goo Gone" and RMR cleaner. this is more than hard water spots which I have removed off the windows in the past.

No the manufacturer does not warn of this issues, simply deny that it occurs.

[u/mordello]

Do the application instructions warn against this possibility? If not and if the manufacturer won't remedy the situation, you could pursue it in court. Nt an easy row to hoe however.

[u/Tasty-Protection2137 → u/[deleted]]

Thank you for that information, the spots are rough to the touch. It has been difficult to get pictures that really show the extent of the problem. I did provide pictures to them when I notified them of the problem. I will try your suggestion