Treatment method:

Step 1: Turn on the hair dryer and hold it in your hand.

Step 2: aim the air outlet at the trademark position on the plastic cup and blow at high temperature for about 30 seconds.

Step 3: Turn off the hair dryer, pry open the corner of the trademark with your nails and slowly tear the edge.

Step 4: Tear off the trademark that no longer sticks to the cup, and the cup will be clean.