Gently wash the pan with soap and warm water. Be very gentle when cleaning your pan if it’s brand new; harshly scrubbing it could cause tiny abrasions in the surface. Instead, use a soft cloth to softly lather the soap into the pan. Rinse the pan to get all the soap off of it before proceeding.
It’s very important to clean newly bought pans to make sure they don’t have any harmful chemicals or substances on them.