Bad water etching on windows - pics and my solution
 

I figured I'd put the solution I found for really bad water etching on the windows, in case somebody else is in the same situation.

Whatever the previous owner did just ruined the glass.

So after a couple hours and a lot of elbow grease, it's not perfect but incredibly better that what it was...

I tried all sorts of stuff I found on the internet, automotive glass cleaner, windex, scratch remover, clay bar...nothing...so I figured I'd go for broke...#0000 steel wool and turtle wax rubbing compound I already had in the garage...

so here's the before and after, I had half the back window done, so the difference between each side...

easy off oven cleaner works everytime..and alot less elbow grease and time. just don't get it near aluminum surfaces. spray on wait and wipe off.

Well jeez...guess I should have asked here first lol...I did all sorts of searching on the internet and tried a bunch of stuff...never saw easy off...I haven't gotten to the windshield yet, I'll give it a whirl when I get around to cleaning it...Thanks!

Tried the easy off...no good, the water spots are part of the glass...but thanks for the tip, I'll keep it in mind for water spots that aren't as bad

would this work on house windows? I have one that has been scratched....

Can't see why not, if the scratches are not too deep it might work...it's basically just polishing the glass with incredibly fine steel wool...but I can't say for sure, this was the first time I ever had to get rid of really bad etching...never thought I'd use steel wool on my M3 hahahaha

thanks. .... I guess I was really wondering whether or not it would scratch the glass worse than it is. I think I'll try on a piece of scrap glass. That'll tell me!
Thanks

Yeah I made sure to test in a small corner in case it made things worse...so good idea to try it out on something else first...good luck