What should I do if the thermos flask can t be twisted open, and the lid of the thermos flask can t

Difference in air pressure between inside and outside. My humble opinion: 1. Twist hard. 2. After heating, after the water inside evaporates, the internal and external air pressure may be balanced.

Soak the cap in boiling water for a while before unscrewing!

Shake vigorously several times. It should be able to open!

1. The reason why the lid of the thermos flask cannot be unscrewed is mainly because the air inside is originally hot, but then it becomes cooler, and the gas shrinks, so that the air pressure inside is far less than the atmospheric pressure outside, so it will be more difficult to screw, and there is no way to unscrew it by simple force.

2. Generally, you can put the thermos flask into the hot water to make the air in the bottle expand by heating, so that it will be easier to take it out and screw it.

3. Or you can put the thermos flask in the microwave oven to heat it up slightly, but you should grasp the time to avoid the phenomenon of **.

1.One of the most direct and violent ways is to find a man to help you unscrew it, they have a little more force, rotate it hard to see if they can unscrew it. And if the lid of the thermos is rotated, you can wrap it around the thermos with a cloth and try it again.

2.If you can't unscrew it hard, we can turn the bottle upside down, and then pat the bottom a few times to generate a certain pressure inside, and see if you can unscrew the thermos flask through the pressure. 3.

If the above methods don't work, you can pour cold water on the outside of the thermos flask, so that it has a certain temperature difference, and it is easier for you to unscrew it again. 4.In addition, if there are still some gaps in the lid of the thermos, we can use a small stick to reach into it and slowly knock along the gap to open the bottle.

1. What should I do if the lid of the thermos flask cannot be unscrewed?

2. What should I do if the lid of the thermos cup cannot be unscrewed.

3. What should I do if the lid of the thermos flask is not tightened?

4. What is the most effective way to unscrew the cap of the thermos flask.

1.The lid of the thermos flask can't be unscrewed, we can put it in hot water to let the air in the bottle expand by heating, so that it will be easier to take it out and screw it again, or you can also put the thermos flask in the microwave to heat it up for a while, and after taking it out, it will be easier to unscrew it, but you should control the time when heating to avoid it**.

<>1. Twist vigorously with force.

2. Turn the cup upside down, slap the bottom of the cup a few times, and then screw the cap.

3. If you can't open it, the cup is generally under negative pressure, so you can put the cup in hot water to soak, and when the water in the cup heats up and the volume expands, it is easy to open.

4. Heat the lid of the cup quickly, so that there is a gap between it and the cup.

5. Put it in the refrigerator first and freeze it, and then pour hot water on the lid (just the lid) after taking it out, and you can open it.

6. Use a key (other flake-like metal is also OK, insert it wider, and do not hurt the cup lid) to gently pry it at the gap between the cup lid and the cup mouth, and the air will enter with a snort, and it is easy to open with a slight twist.

7. Drill a small hole in the cup (or lid) to make it leak to achieve a balance between internal and external air pressure.