1. First, look at the sticker on the board as shown.
2. Next, apply a proper amount of adhesive remover to the sticker on the board, as shown in the figure below.
3. Then you can slowly tear off the sticker on the board, as shown below.
4. Then, apply glue remover on the glue stains left on the board, as shown in the figure below.
5. Next, take out the paper towel and clean the board, as shown below.
6. Finally, remove the sticker from the board as shown in the figure.