During conservation, a lot of modern housewives do not use a seaming machine with standard lids, but cans with screw lids that have been fashionable in recent years. It is reliable, and the seaming process itself is carried out according to a simplified scheme.
However, the pluses come with a big minus - it can be too difficult to open such a cover. In the process of preservation, a vacuum appears inside the can, which does not subsequently allow to open the lid without the use of serious physical force.
Naturally, our people are not looking for easy ways. Quite a few people, in order to let air into the jar and easily unscrew the screw-type lid, take a knife and insert it under this very lid, turning it slightly.
It works, but it's not safe to do so. First, the knife can break off and injure your hand. Secondly, the bank can burst and again injure the opener. Thirdly, shards of glass can get into the contents of the jar and then the product will be spoiled.
There is an easier, more convenient, and most importantly a safe way. With one hand, you need to take the jar by its bottom, and with the other fist, lightly hit the lid from above. Thus, air enters in and the lid unscrews without problems.
It will be no less interesting and useful to find out how to open a jammed jar with adhesive tape: a survival life hack.