To remove the logo of offset printing on clothes, you can try the following methods:

1. Use alcohol or detergent: apply alcohol or detergent to offset printing, brush lightly with a brush, and then rinse with clean water.

2. Use lemon juice or white vinegar: smear lemon juice or white vinegar on offset printing, let it stand for a while, and then wipe it with a wet cloth.

3. Eraser: Wipe back and forth on the offset printing with a clean eraser until the offset printing disappears.

4. Use hot water: soak the clothes in hot water, then brush them lightly with a brush, and then rinse them with clean water.

Please note that before using these methods, it is best to test in an inconspicuous place to avoid damaging clothes.