He seems to be settling really well-he is pretty brave even around our lively toddler and has lots of lap time. He's a very cute kitty, he plays, has cuddles and is all round a rather beautiful little soul.
This week we noticed the unmistakable scent of cat urine in our bedroom. We looked for advice online and borrowed a uv lap to find the wee and used vinegar and Bicarb to try to clean up and remove the smell. We couldn't locate the urine from the uv light but went on where it smelt the strongest. After treatment, it seemed to fade a bit but tonight its worse again. We fear he might have done it again in the same place. Some people mentioned 'spraying' but all our past male cats have been neutered at an approprite age and never sprayed so I don't know much about it. could a 15 week old kitten be spraying or is it simply urinating? If it helps, I can't smell the urine smell close to the carpet, it's stronger a few inches off the floor, but can't smell anything on the walls.
Looking for advice a) on why he might be doing this and how we can prevent it (whether spraying or weeing) and b) best ever advice on removing the hideous smell from my bedroom

Much appreciated.