However, you can forgo the soap and clean the pan with water and a scrubber, as the heat introduced during reseasoning will kill any bacteria, or scrub it with a bit of salt in a still-warm pan to act as an abrasive and dislodge any buildup. Avoid sticking your pan in the dishwasher, leaving it to soak in water, or immediately introducing a hot skillet to cold water, as these actions can rust and warp the cast iron.