boris Dear Boris Thank you for showing that link. I went and read it and have a question. The link is about how internal stresses are created when molten glass is cooled quickly in ice water, purposefully to create surface tension differences. Can internal stresses like that take place after a glass object is formed and already solid/cooled? Such as from a dishwasher's heat? The article says the stress is formed by the ice-toughened skin around the hot center glass molten, creating a tension strong enough to cause it to explode upon receiving a scratch. But there is no toughen-able skin on a factory made glass, at least I dont see how a molecular change can take place AFTER the molten stage without the foregoing being copied to the same affect DURING the manufacture, dishwashers dont get THAT hot. What do you think? (I always hated physics as its so illogical) Thanks for any basic physics common sense you can offer. The glass is so shattered on the thick base, it looks white like rock candy.