Join Date: Jul 2014
Location: Northern California
The hardest windows I have ever cleaned were in Los Molinos, CA. right on the Sacramento River during the hottest time of the year. 109 F. I was called to clean 35 windows, half of which were facing west. The stucco guys over sprayed about 90% of every single window with stucco and it cooked while the house was under construction for 8 months.
Nothing and I mean nothing would take it off. My final idea was to buy a drill (with a cord) and a couple of buffing pads and used several cups of home made window cleaning paste (4 parts baking soda to 1 part vinegar) and I buffed all 35 windows then wiped away excess powder. The east widows didn't take too long, but the west windows took me 2 days. By the time I was finished with the windows they looked brand new and I earned an extra $1,000 that was back charged to the stucco contractor.
I have since used this technique on all hard water issues on glass, including shower doors. I highly recommend anyone try this method for cleaning hard water stains that will not come off otherwise. I kid you not.
This also works on aluminum shower door frames that have oxidized. After doing this on shower door frames you will need to either use a small amount of stainless steel cleaner or baby oil to shine it up and then wipe away the excess. This works. I recommend when using this method for residential housekeeping jobs that the client not be there.