Health issues are the #1 cause of inappropriate peeing. Have him looked at by a vet and get a urinalysis.

As for the feliway, you are suppose to spray the feliway where the cat is NOT suppose to pee. The theory behind how it works is that a cat does not pee where the feliway hormones are sprayed. So don't spray it around the litter box, spray it where he has peed ELSEWHERE in the house.

I do have one question though, did you have him declawed? I ask because you say he is seeking out SOFT things, a common sign that his feet hurt from the declaw. But if this is not the case, then UTI or crystals in the urine would be the most likely cause.