I have a Color LaserJet Pro MFP P180nw that has suddenly developed parallel squiggly lines from top to bottom. It appears that whatever is making the "squiggly" lines is imbedded somewhere as it leaves marks slightly imbedded on the paper. The print is normal except for the lines, which will rub off leaving the rest of the print intact. I have replaced all the toner cartridges (first time replacements) and the rollers on each of them appear to be clean (I have not touched them!) I have shaken each cartridge numerous times and blown out the innards as best I can. What else can I do?