Erm how come every time I cook a frozen pizza, my smoke alarm goes off? It happened EVERY TIME when I lived with my parents, and I just now realized that it happens with this oven, too. Wtf? How can I stop this from happening? And its just pizza, too. Never anything else. *Edit* Yes, I take the plastic and cardboard off. And yes, I cook it on a sheet. This is why it is so perplexing! Sigh. At least my pizza is cooked now.