canon 6010

i started getting black streaks on my prints. I've done a wire clean, wiped down the ITB and cleaned the glass protector under the laser. I don't see any obvious damage anywhere else...any ideas?

imagepress server with EFI Fiery 1200 Rip, Eye-one photo spectrophotometer,Standard 2 cassette draws - capacity 2,000 sheets with POD DECK-A15 -3 additional drawers Total capacity 6,000 & up to 5 different stocks for multi media jobs.Saddle booklet finisher-AJ2 - 2 output trays (2,500 sheets)...