Work smarter not harder. Here’s how to open a stubborn jar lid using more brains
than brawn. Take the back of a heavy chef’s knife and give the side of the jar a tap in the direction that you want the lid to go. Instead of distributing your force evenly over the top of the lid, you’re focusing it in one spot. That’s usually enough to break a stubborn seal. if you’re successful, you’ll hear a pop. Kitchen physics! No fancy equipment necessary.