My fingernails are tar black. This is because my bicycle has been logey for some time, and careful inspection showed quantities of dirt and mud caught in the chain and front gears. Probably the back gears too, but those are harder to get at. Careful cleaning doesn't get at the problem, so I went in bare-handed and picked the stuff out. Yes, I should have had it tuned up before the soft summer bicyclers all decided it was nice enough to go for a spin and brought their rarely-used vehicles in for overhaul, but I didn't.
Special soap cleaned the skin, but only time will get under the nails.
Piriformis has been acting up in spite of stretching and acupuncture and physio, so today I had a massage. Hadn't intended for it to be shiatsu, but I got a Japanese masseuse and a very shiatsu-type half hour. Shall see if there's fall-out from this (have I told you my shiatsu in Japan story?) but have booked another session plus acupuncture for next week. Piriformis has of course tightened up again.