Ink smudges on all paper

[Marieta5588]

 My Laser Jet Pro M404dn at work keeps ruining all our paper. I’ve run clean cycles. Checked to make sure nothing is stuck in printer. Anything else I should do to fix this?

[Valsimot]

Defects on printer rollers can cause image defects to appear at regular intervals on the page, corresponding to
the circumference of the roller that is causing the defect.
Measure the distance between defects that recur on a page, use the following table or the repetitive-defect ruler to determine which roller is causing the defect.