Bring the pan to the boil before use. Then clean with mild washing-up liquid. Wipe clean. Heat the pan and grease with cooking oil, Muurikka frying fat or non-stick spray. This protects from rusting and improves the frying properties. If the pan is damaged or the fat has been washed off, reseason it.

Clean the pan with hot water. If food residues have stuck to the pan, soak it and/or scrub it with steel wool. Do not use washing-up liquid as it will remove the grease from the surface.  

It is normal for the surface of the pan to change colour after some use.