Sounds like you`ve got excess ink on the rollers or mechanism. Suggest you print about 20 blank pages of a word document to drag out the excess and let it dry out overnight. In the morning, if it isn`t cured when printing another 20 blanks - take out the ink cartridges and see if one`s leaking. Use some kitchen roll to dab the rollers and print mechanism. In particular let one soak up the cleaning area usually to the right where the cartridges "rest" (With the cartridges removed the carriage should be somewhere in the middle.)
By the way unplug the thing from the mains whilst you do it!