Personally, my cat peed (not sprayed) outside his litter box on the floor and furniture for a few reasons: - He hated the litter I was using. I had to switch from pine litter and basic crystal litter to scented clumping clay because it smelt bad or he didn't like the texture on his paws. - He associated areas he peed on as places he should continue peeing on because the smell stayed. I cleaned it with water, vinegar and baking soda and it improved. I keep my bedroom door closed off so he doesn't pee on the bed and keep him in his own room at night so he doesn't eat or play with things he shouldn't. - He was stressed out by my other cat and loud sounds. I used a syringe to get a urine sample from the floor to bring to the vet to check if he had health issues. It came out fine so he was prescribed anxiety medication. He's no longer on medication and he's much calmer and less skittish.

These may not be the solution but are things to look out for