Borrowing a printer serial cable from somewhere and exchanging it with your old one. Reinstalling your printer driver or getting a more recent version for your particular model of printer. Check your manual to see how to run a cleaning cycle. Your cartriges are old - replace them. Even if you don't use your printer much, once the cartridges are installed, the ink inside begins to get sludgey from exposure to air.
Different manufacturers state different durations before recommending replacement.
Don't exceed the manufacturer's recommended amount of paper for the tray. Apply a small amount of Tri-Flow to a small clean rag and apply to the roller surfaces. Wipe dry with a dry clean rag. Maybe most of the action is with the brush and the lubricant helps remove the residue. Anyway, it works but the long-term effects are unknown.