Epson AcuLaser C1900 Reference Manual page 260

1. Open Cover AB of the printer.
2. Open the cover below the paper path roller as shown below.
3. With a clean dampened cloth, wipe the pickup roller.
4. Close Cover AB.
Caution:
c
Never use alcohol or paint thinner to clean the printer cover; these
chemicals can damage the components and the case. Be careful
not to get water onto the printer mechanism or any electrical
components.
260
Cleaning and Transporting the Printer