Wipe the gasket down with some silicone sprayed on a cloth. That should stop it from sticking in the future.
I have had roof vents stick and the spray fixed them also,
2011 351RLTS Eagle, Mor/Ryde suspension & pin box
06 F350 Lariat PSD, SRW, LB, CC, EGR delete kit, 16K DrawTite hitch, Timbrens, TST TPMS
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