1. First take out an empty beer bottle, and then wrap the scotch tape around the beer bottle in reverse, so that the sticky side of the tape can be exposed.

2. When winding around, wrap it loosely, leaving a gap between the tape and the beer bottle, which is convenient for the tape to roll with dust.

3. Finally, put the bottle on the dusty sweater and roll it a few times until the dust sticks to the adhesive tape, so that the dust on the sweater can be stuck off.