Then place the scooped out part around the lid, gripping the outer, fuzzy layer in your hand. The interior rubber grips the metal, providing a better seal.
Or...you can just wind a rubber band around the lid (preferably a nice wide one). Works (almost) every time!
Also, not sure how green it is, but a silicone hot pad works awesome. They are also great to put under a chopping board to keep it from sliding around.
Stick a metal skewer under the lid - breaks the vacuum, opens easily.
I just use a rubber dish washing glove.
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