1. Because the glue bottle mouth is too thin (to prevent the glue from leaking out). After using the glue, first combine the hair of the glue brush, then gently insert the brush into the glue bottle.
2. If the brush is confusing, there are three solutions:
(1)Remove the internal plug of the bottle mouth, but the glue bottle must be placed upright on the horizontal surface;
(2)Do not take the internal plug, clear the brush with 100 degrees Celsius water;
(3)Cut off the excess messy brush with scissors and continue to use it.