How to remove white 'scuff'marks on print jobs?

How to remove white 'scuff'marks on print jobs?

Had no problem until this week - my 1710 printer is not printing clearly, there are scuff marks that repeat in 'white cloud' shapes down the page in regular intervals. I have pulled out the printer catridge etc and have wiped out excess toner internally via the front panel. Is this problem caused by a piece of paper stuck on the rollers ?? The dell toner cartridge is hardly used, as new.