Fair enough, I've used quite cheap dishwashers in the past for this - where the heating element is used to heat the water up. Due to general cheapness, I'm sure there were hotspots.
That said, under hot loads with an old/cheap dishwasher I've only had issues with the large baseplates and very large/thin elements typically found in Technic sets - everything else has turned out fine.
That said, under hot loads with an old/cheap dishwasher I've only had issues with the large baseplates and very large/thin elements typically found in Technic sets - everything else has turned out fine.