To clean a HP 1220 series

[Pamilee]

Hello,
I have an HP Laseret 1200 series printer. Everytime I print out a document, I am getting a faint black streak on the left side of the paper. I've been cleaning the rollers, however, it's still appearing. Any suggestions??? Thanks!

 

[Emerald]

it could be he roller or the toner seal on your toner cartridge