We used it and bio clean the green stuff on a shower door it worked just took for ever due to the 2 inch pad .
Dat what pad do you use again for hard water on you makieta?
And you said stone scrub over bio clean also ?
Yeah, white pad/red pas, stone scrub and makita.. it what i been using the last three years for windows as well ever since i was introduced to it. Magic al is good too when mikey showed me. Probably better too. Stinks though when interacting with build ups.