Shannon and I have suffered brutally from some rock-hard water at our house. We’ve been through 3 or 4 sets of glasses in the few years that we’ve lived here, each of which has succumbed to a gradual fog of limescale which appears on its surface after only a month or so. We tried vinegar, which didn’t seem to work successfully, and then just got into the habit of buying sets of 6 glasses for £2.00 or something ridiculous from our local Tesco home store.
Now we’ve installed a water softener, and can already tell it’s positive effects on our glassware.
So this tip for cleaning your knackered glasses has come too late for us. Maybe it can save you, though…
How to clean cloudy drinking glasses – Lifehacker
“The secret? White toothpaste–”The cheaper, the better,” according to the author, who prefers the dollar-store variety. Just apply some to the glass, scrub it with a toothbrush, and rinse. Presto: shiny, clear, like-new glassware.”