Hey guys I did this large commercial job where I had to use a pretty hot mix on the entrance blocks, however the entrances also have a ton of windows. We did a full window cleaning after the wash and there are spots all over the windows where I used the hot mix. Vinegar wouldn’t take them off. Can bleach burn commercial glass? Not sure if it could have damaged like a low e coating or something Ive never had this happen before in my 13 years. But we also mainly do residential. Any ideas on how I can fix these? And how to avoid this in the future? I guess I could have someone rinsing as I spray. I’ll be talking to the building manager soon and I’ll probably offer to polish the windows if I need to
Did the windows have a film or coating on them? Anti-glare and UV Tints can be affected by chlorine.
Thats what I’m assuming
There are lots of window cleaners on here @dcbrock might be able to help. That glass looks like my truck windows after I hose it off with my PW. Hard water (I think the window guys call it high TDS or something). You cleaned the windows with DI or did you use the regular water from wall hydrant? I have issues washing rv, camper, car haulers from the hard water spots, maybe re wet with a rinse aid or something and wipe them down. I’m just spitballing here, not a window cleaner.
I hate to say it but that dried hot mix might have etched the glass. I had this issue on a house a while back and fortunately I was able to razor most of it off but there was a definite ‘shadow’ left over.
Wet-n-Forget will do the same thing if left to dry too long.
We’re a full scale window cleaning company along with pressure washing. We cleaned these by hand and the spots wouldn’t come off with steel wool. I’ll have to either polish them with cerium oxide or possibly bio clean. Ive heard one restore might do the trick but thats an acid and I don’t want to damage the windows furthur… will just have to try it out and see what works best… really kicking myself for this one
You can try BioClean, I use it on windows with old aluminum screens. It’ll be the mildest baseline chem for sure.
We use OneRestore for stuff like that, have for years…..if it was “coated glass” it might be damaged. If it’s coated you don’t want to use OneRestore either. No acid on coated glass, it damages the protective coating. When we use a hot mix, we always have someone constantly rinsing with fresh water, no issues that way. Hope it works out for you guys…..
Most low e is coated on the inside of the glass, so where the gas is, it’s either on the inside portion of the outside portion glass or the inside portion of the inside glass….depends on your goal with the low e.
Im thinking if I polish it that will take the coating off too right?
If it is coated I wouldn’t take a chance with it….i would take good pics and talk to a local reputable glass company, get their thoughts. I’ve done that before to get some advice on a job we were going to do…
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