Gaskets were not sealing due to wear

I loosened(but did not remove) the 1/4" sheetmetal screws around the perimeter of the door liner. (they are numerous and they are hidden in the fold of the gasket) I removed the old gasket. With the screws still loose, I installed the new gasket. After insallation I re-tightened the liner screws. Several gaps were noted and eliminated by gently heating the gasket with a hair dryer. (be patient , it takes some time)