12 year old tom car (neutered) but he sprays regularly and it's driving me to distraction. All over the house, skirting boards, curtains, hall way, plug sockets (now covered but have had to have electrics done, spent £100s to repair damage). Have been away, son looking after cats, he's very good with then. Have come home to a shiny kitchen floor, it's covered with a film of cat pee. I know it's stress but he is literally stressed by anything, a leaf falling from the tree, a squirrel. I've tried an indoor litter tray, no difference. I've tried calming spray, no difference. I've had him checked by the vet, no obvious health issue. I am soooooo fed up. My house smells of cat pee, I never know what is going to greet me, often I pick something up and recognise a horrible sticky feel. Any advice?????