That's exactly what I was thinking when I first read your post, Larry.
A hair dryer or heat gun at just the right distance. And an Ove Glove to press alongside the dimpled area of the gasket for a minute or more, to pucker it out, then holding through a cool down after withdrawing the heat. With just the right amount of heat, side pressure, and timing, hopefully the gasket's dimple will be less obvious. If not too severe, air leakage via a gasket warp can be compromised with an application of vaseline across the problem area too.
Joel