You ever tried applying final wash then rinsing off? That’s what I used to do for windows before I had a wfp and di system. Works better than nothing for sure
I have not. Never even heard of it.
We have noticed this problem also, TDS average around me is 220-250 average.
We notice the spotting is harder to remove during summer months, I have been told is due to an increase in chlorine at the treatment plants…
So this year, I bought a chlorine filter and the spotting have minimized significantly, and most importantly when we do get spots they wipe off with no effort.
For us, the black aluminum window frames are the issue… those tend to spot real easy… But this seems to be working for us
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When you wipe them, are you putting anything on rag? We have low TDS but still get some spotting occasionally on commercial where they use those dark bronze tone frames.
I had to wipe black gutters like this. I used dragon juice 10-1 in a rag and just buffed it. Wasn’t too difficult
