I've noticed that whenever I put my aluminum cake pan and baking sheet in the dishwasher, it gets a chalky, grey residue that comes off on your hands. It concerns me that this isn't safe (I scrub it off by hand before using). Does anyone know what this film is, and why a dishwasher brings it out?
Sign up for our useful, inspired emails and we'll
give you everything you need to eat and live better -- including
recipes, how-tos, and exclusives and great gift ideas from
Provisions, our kitchen and home shop.