Epson 1000 Reference Manual page 64

Take out the imaging cartridge, shake it from side to side to
distribute the toner, and then reinstall it. If the problem
persists, replace the imaging cartridge as described at the end
of this chapter.
Image is too dark
Use the DENSITY option in SelecType Level 2 for lighter print.
If the problem persists, replace the imaging cartridge as
described at the end of this chapter.
Non-printed side of the page is dirty
Toner may have spilled in the paper feed path. Remove the
imaging cartridge and then clean the paper path of the printer
using a clean, soft, dry, lint-free cloth.
WARNING:
Opening the printer exposes the fuser, which is marked by a
CAUTION HOT SURFACE
fuser.
3-12 Troubleshooting
label. Be careful not to touch the