Samsung CLX-9250ND-XAA - Manual (Page 108)

Maintenance_ 108
Cleaning the paper sensor
You need to clean the paper sensor to prevent paper jams.
Follow the cleaning procedure below.
1. Open the right door.
2. Clean the paper sensor with a soft, lint-free cloth or cotton swabs. Dampen the cloth or cotton swabs slightly with water, but be careful not to let any water
drip onto or into the machine.
3. Close the right cover.