Gasket Replacement on a LL Pocono Back Vent

Hello all you warm coal burners.

Does the "if it works don't fix it" apply to all the gasket on my Pocono back vent. I had this warming us up during the last 2 seasons. The gaskets seem to be working but I do think I should remove all of them clean of the metal and then reglue new ones in place. I'm not sure if I ever read that on here so I'm not sure if It's best to do.

Thanks for any and all info.