Well, my mother in-law shared a great tip to keep the lid from sticking/sealing shut!
It's as simple as flipping the lid upside down!
Now why didn't I think of that!?
When I took her jam out to use it I just thought someone made a mistake, but was informed that is was a brilliant way to save me a LOT of cursing because I flipped jam all over! (Admit it! You've done it before!) :)
So there you have it! Flip the lid once you've opened your canned items and save yourself some frustration!:)