Having been a window cleaner for 22 years, I can tell you we came to resent house pressure washers as some of those chemicals used would be very difficult to get off the glass, a white substance almost like hard water stains. My last ‘pressure wash cleanup’ job was so bad there were white chemical drops on their deck that WE couldn’t even remove.
Ironically here I am, on the other side of things. I have the advantage of offering to clean the windows afterward, but just curious how you long time house washers deal with customers upset with their windows getting spotted and streaked with whatever you use.
Funny enough the only water spot complaint of the hundreds of homes I have done was my own grandma… and yes hers were spotted bad! We have super hard water and that was the culprit. I haven’t had one complaint since then. Making sure you don’t let the soap dry is the key.
Yeah, around here contractors are rather…well, let’s just say they don’t go the extra mile. I’ve seen it so bad the windows are nearly opaque. Hopefully a good rinse will prevent spotting.
I have this crazy idea of using an RV water filter to rinse windows.
They recommend it for washing cars to reduce spotting. Same principle. Maybe that’s just marketing hype, but it’s on my list of random things to try. Surely not as good as RO/DI, but maybe it does something. It’s only $15 and the hose just screws into it.
I use Elemonator and I’ve actually had customers cancel exterior window cleaning because their windows looked so great after power washing.
Our well water here in the mountains is pretty good though. I’ve seen 15 TDS from the spigot before, 25 is about average. City water Is different of course, but the Elemonator makes all the difference.
