Worn Extruder Drive Gears

Not sure if I had them badly adjusted but after running about 6 kgs of filament through the Fisher I had a failed print due to wearing out the small gear wheel. Luckily I printed a complete replacement part set when I finished the printer so its an easy fix, infact with some adjustment it appears to running OK for now and printing another replacement set so I can leave the others in the bag.

So my question is - does anyone grease/lubricate those gears, I've added some white lithium grease as it seems a good idea but wondered what others were doing.

And in any case this is probably a good warning to those that just finished their builds to print themselves a spares kit. A couple of each part is all that's needed I guess although I did make a complete set in the end, but you'll have to the lay out your own build plates as the ones from git hub aren't for the fisher printer.

Duely noted thanks