Tool: Pizza Stone
A pizza stone is a flat stone, ceramic or earthenware used to distribute heat evenly while cooking pizza. It's the best way to get a nice crispy crust.
Pizza stones, like cast iron, should never be washed with soap. You should scrub them using the hottest water possible. If you have a greasy buildup, make a paste of water and baking soda and use that to scrub the stone.
The best baking stones do NOT require you to soak them in water.