First: knocking at the door. This method is to knock on the edge of the bottle cap, that is, a round edge, hold the bottle body with both hands, and then knock a few times at a place that is not very hard, such as the countertop position of this cabinet. Don't push too hard, or the glass bottle will break and scratch your hand easily.

This method is important to tap several times, and then pay attention to the tap position is the bottle cap, with even force, tap constantly and twist as much as possible.

Second: pat the ass, which is relatively simple. I believe many friends will know this method, that is, turn the canned bottle upside down and pat the bottom of the glass bottle with your palm. This method can be stronger, because everyone's strength is still limited. After tapping, try to twist the lid several times until you can unscrew the bottle cap.

Third: lighter. If you eat canned food outdoors, such as going out for a picnic, you can ask people around you if they have lighters. If there is, burn the edge of the bottle cap with a lighter, which is where you will encounter when screwing. Just burn it gently.

At this time, the bottle cap is very hot. Don't try to twist it. Just touch it a little and then twist it until it is not particularly hot. This method is because metals expand when heated and contract when cooled. After heating with a lighter, the bottle cap is not so tight.

Fourth: hot water. If you eat canned food at home, you can put the canned food in a container with hot water, and then pour a little hot water on the bottle cap. This method can be used for canned foods that have been placed at room temperature before. It is not suitable to pour hot water directly when taking it out of the refrigerator. This is also because it expands with heat and contracts with cold, which makes the bottle cap loose. After drying the water, it is easy to open.