Rejuvenating antique printer - Toner dump?

[bucolic_frolic]

4. Update: Cleaned rollers, fuser surface

and added automotive dielectric grease to drum contacts. Rollers at the fuser were caked with micro-sticky black toner. Not that they created lines in that area.

Results are fair, with some reduction in the number of spider bites especially the 2 large ones, and general reduction in what looks like dust on the print. Also the printing is much darker. And it is telling me to change drum but it still prints. I'm guessing the electrical contacts were so weak as to print lightly with static and not enough current to activate the "change drum" circuit. Doubt I'll throw $30 at a new drum when a whole new monochrome laser printer for home use is about $75 to $100. But that decision is down the road as this one can still be used for my main function, eBay shipping labels.

Thanks to all who weighed in!