"Paul K. Dickman" wrote in message
...

"Joseph Gwinn" wrote in message
It is not breakage. The strongly alkaline automatic dishwashing detergent
will etch the surface and they will loose their shine. It will etch
regular glass to, just not as fast.

From wikipedia
Lead crystal should not be cleaned in a dishwasher as the corrosive effect
of dishwasher detergent is high on such types of glass-that is, it will
quickly go 'cloudy'.
http://en.wikipedia.org/wiki/Dishwasher

Paul K. Dickman

I've seen KOH in boiling ethanol etch Pyrex cloudy in a few minutes.

jsw