This is a case in point. After the product of ordinary glue is heated, the glue will "melt", and sticky things will be easily torn off after melting. This is why the daily necessities bought by living species are easier to tear off the labels when baked with hot water or fire. But when the temperature drops, the glue will reattach and it will be more difficult to tear off.

There is also some glue, which is resistant to high temperature. Even if scalded by boiling water, the adhesion will not be reduced. If there is demand, you can use Baidu to search my screen name, which is introduced by the webpage.