Please can someone resolve an argument between my wife and I? She says some of our drinking glasses, mugs and cups are cracked because of the dishwasher, and we need a new dishwasher. I say that items in a dishwasher get very hot, and frequent washing in a dishwasher can cause the glaze on porcelain/pottery mugs etc to craze or crack. Drinking glasses seem to develop what look like deep scratches after frequent washing. But surely this is only natural, and is just the price you have to pay for the convenience of using a dishwasher - it does not mean the dishwasher is faulty and needs repairing or replacing?