1, make a paper ball with newspaper, fill the bottle cap and leave it for a day or two before taking it out, and the bottle cap will swell.
2. Clean the bottle cap again, and dry it after cleaning. When the hat is eight minutes dry, blow it out of the hat pocket with a hair dryer at low temperature, and the "plastic" hat will also be improved.
3. If the above methods don't work, you can slightly wet the bottle cap, spread a layer of wet cloth on it, and iron the deformed place through the wet cloth to restore the shape of the bottle cap.
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How to prevent deformation of bottle cap?
1. Don't throw your hat in the corner, especially on the sofa. If you sit on it carelessly, it is easy to be crushed and deformed. It is suggested to use newspapers or other materials to make a bracket and put it inside the hat to support it. In addition, pay attention to the placement of the bottle cap and try to put it in a dry place. If you don't wear it for a long time, you can put it in a box of the right size.
2. When cleaning the bottle cap, pay attention to avoid using water with too high temperature, which will scald and deform the bottle cap; In addition, it is recommended to wash the bottle caps by hand, not in the washing machine. Don't rub too much when washing by hand. Brush with a soft toothbrush and pay attention to the cleaning method. Basically, it will not deform after washing.