Greylandra
Active Member
http://www.google.ca/url?q=http://m...IICzAA&usg=AFQjCNG4g52YyZB-m57nLBltNzCeWTI8cQ I think superheated water is is a remote but plausible risk of microwave oven use. Even with mineral/tap water. Reheated enough times past the boiling point should allow impurities to form a precipitate collecting along the top of a container while the level of water goes down with the evaporation due to boiling thereby purifying what remains to the point where super heating becomes possible.