Stick the tip of a spoon under the lip of the lid and push the handle towards the jar. That should open a little gap that releases the pressure inside the jar and it'll open pretty easily then.
One day I will get a consciousness transfer into a fancy robot girl body and then I will open all the jars.
They are hard to open due to a vacuum seal. So just take a very small flathead screwdriver and put it under the lid, and apply a small amount of upward force to break the seal. The jar pops, releases the pressure, and now a toddler can open it. I use the nail file on my pocket Leatherman. Works every time.
Won't you bend the lid and lose the ability to reseal it properly though?
All these people are complaining about how hard it is to open a jar, and I'm sitting here scratching my head because the only times I've ever struggled with jars was after someone closed them too tightly. Just don't use a death-grip when you're closing your jars and you'll be fine unless you're elderly or something.
