Scald it with boiling water and it will be easy to uncover. If it is still sticky, wipe it with a cloth stained with banana oil, and it will be gone.

Blow hot air with a hair dryer for a while, and then tear it off by hand.

All right. If there is any viscosity left, it can be quickly removed with banana oil, oxalic acid, gasoline and thinner, but it will make the plastic bucket material aging and deterioration. The best way is to soak it in vinegar and then wash it with toothpaste.