Flu still has me feeling blah but I wanted to do something besides watch TV, so I cleaned out R2's gearbox. Really got in between the gear teeth this time. On this older Roomba model, dust and pet hair has a way of getting into this gearbox. https://chirp.cooleysekula.net/attachment/260c782954aedb50e2cb645e182a3d1318a74bd6bcf22a81a95aa4b7b601ffce/view