Recluso wrote:
Thanks folks, that's really helped.
Noodle, he DOES have a hooded box so I do suspect it's on the plastic (I usually rinse them off with clean water a few times a week but don't want to disturb it for a few days until he knows it's HIS place to pee).
Since putting on the extractor, the smell has definitely diminished in there which again makes me more convinced it's a ventilation issue and not 'argh he's peed somewhere!!'.
He won't be staying in there permanently and the place the tray will actually be set up (when we're happy he's not spraying) is much more open and airy but I'm going to take a look at the stuff that has been linked and consider picking some up to have a go with.
The bathroom is tiled so luckily I can give the whole place a hosing down if I need to!
Entire male cat urine is designed to attract females and to mark territory. It won't do that if it is not intense and long acting. Even a small drop of urine can smell atrocious.
I would guess he is peeing/spraying up the side of your litter tray, so whilst a lot ends up inthe litter itself some may stick on the sides of the hooded tray.
I would not use any "fragrances" or any other "neutralising" chemicals in the confined space of your bathroom.
"natural" fragrances and neutralisers are chemicals too and are not really designed to be used in a small place with a live animal.
Also he may find a strange smell, an excuse for him to spray to get rid of it. :)
So use your fan a lot, would be my advice.