I have this horrible Canon MF5550 printer. (Multifunction, yup.)
Aside from the fact that it regularly goes offline and sucks down toner like a drunken sailor drinks rum, it appears to get these remote desktop redirected printer docs stuck in its memory. It will still print other docs, even though there are thousands of these things ahead of it, but it slows down printing abominably (like takes 3-5 minutes to print.) so every two days or so, I have to go into the printer and delete these things -- and I am talking like 25,000 - 50,000 of them -- which takes a while, too.
Canon was no help, they said it's a network problem. (Typical) But none of the other printers on my network are experiencing this issue. It is connected locally to one of the computers via a USB port and then shared over the network.
Any advice/input would be greatly appreciated.