My male (soon to be neutered) cat keeps peeing everywhere and I mean everywhere. Up the front door, behind the tv, up the bath, up the bathroom door, up Dds radiator and up the kitchen door. I keep clearing it up then spraying with dettol but the smell is still there every day. What's the best thing to use? he has a litter tray and goes out but will being neutered honestly stop him peeing?