Tips and Tricks
If you're having trouble turning into toast, look for the objects listed below in the corresponding stages. Some will need to be destroyed first, so that they actually emanate heat, while others will require you to stick around for a while. In every level referenced, you can also use the ceiling lights.
1 (Kitchen) - Toaster, Open Oven, Stove Top, Rocket Exhaust
2 (Lounge) - Wall Heater, Floor Lamp, TV (after you drop a bowling ball on it)
3 (Bedroom) - Curling Iron, Clothing Iron, Floor Lamp
4 (Bathroom) - Hair Dryer, Radiator