seal was black and stiff from burned in spilled grease and sauce

Unscrewed and pulled the door off and then took the three layers of the door apart in order to clean off the burned-on goop and remove the old and insert the new seal. The last screw was rusted in and the drill stripped it so that it was impossible to remove. I levered the remaining two layers apart, holding them open with screw drivers, and inserted the new seal. Had to be careful with the shaping of the metal core of the seal and the distribution of the sealing fabric. Phew! I saved the screws from each layer separately by taping them to the counter in the order of removal. This made reassembly easier. Getting the door back on was a bit difficult and I needed another pair of hands to help me.