Londongirl, awww...Meet cat-crazy me and probably one of the few here that can sympathize with your not-so-happy cat. Isn't it funny how they don't learn...Or that they learn to make do with what they have left and are daring enough to go right back where they got their injuries from. Perhaps
Feliway might help calm your kitty down and make all involved happier?
You can buy it from pet stores as a spray or a plug-in thingy that releases those happy-hormone-like substances into the air. Aaaand
maybe you could also buy enough catnip live-plants and place pots all around so your kitty will be so high and happy, s/he won't care to leave home. If you can't find the plants (which are real potent...) any catnip will do. I've seen my kitties tear up a bag in play and then lie tummy up pawing the air (as if doing a silent rap) and purring up a storm.
Can anyone say cat weed?
Sorry guys...Back to the hair topic, I am one of the lazy ones that doesn't do much at night except sometimes put on a plastic cap after having sprayed Dew in my hair for the day wear. However, the night before my wash (done twice a week), I do drench my hair in oil (remnants of Paltas BKC) and sleep in a plastic cap.
[EDIT: I assumed he was neutered. Good point, indeed, Mermaid! If he isn't; he'll be a much happier kitty once he is. Or if he is, a visit to the vet might be a good idea anyway to make sure they got all his gonads (a piece left might cause problems). Also it'll be a good way to rule out urinary tract infection. Good thinking, Mermaid.]