After several days of trying every concotion imaginable to remove the
hardwater deposits from our glass block shower stall, we tried Bruce's
GSR Glass Water Spot & Stain Remover, which I found at the local ACE
Also found their website: http://www.brucesgsr.com /
Used with 0000 steel wool, it removed the spots entirely, albeit with
a couple passes of heavy scouring. But, it was a 5-year buildup.
I suspect the mineral deposits may have actually been etched into the
glass and that in fact I was polishing a layer away, rather than
removing a deposit.
At any rate, the glass looks terrific.
Bill in Cave Creek, AZ.