Your floor is clean. To your dog it still says go here.
That is why he keeps choosing the same spot. The mark he left sits in a layer your mop never reaches, and every time he walks past it, it tells him this is the place. "No Pee Here" Spray covers that layer so the spot stops reading as a toilet.
You have already cleaned it. Twice.
Enzyme spray, a steam cleaner, the thing your sister swore by. It comes up clean, and three days later he is stood in exactly the same square metre.
HE IS NOT DOING IT TO SPITE YOU
Nobody wants to believe their dog is being difficult, and almost none of them are. A dog goes back to a spot because the spot still tells him to. It is information, not attitude. That matters, because if you read it as defiance you punish him, and a frightened dog hides the next one behind the sofa.
YOUR CLEANER FIXED IT FOR YOUR NOSE
A dog reads scent at a level we do not have words for. You mop, it smells gone, and as far as you are concerned it is dealt with. To him the marker is still sitting there in the grout, the underlay, the seam of the sofa cushion. "No Pee Here" Spray is aimed at that layer, not the one you can smell.
FOUR PLACES, NOT THE WHOLE HOUSE
Think about where it actually happens. The rug edge. That one table leg. The corner by the back door. The bin. It is almost never everywhere, it is the same short list. Treat those, leave his real toilet spot completely untouched, and you are working with his nose instead of against it.
THE SPRAY CLOSES ONE DOOR. YOU OPEN ANOTHER.
This is half a system and we would rather say so. The spray takes the old spot off the menu. You still have to make the right spot worth choosing, which means going out on a schedule and paying him the moment he gets it right. Owners who do both keep it. Owners who only spray get a fortnight.
What the spray actually does
Straight answers
Yes, it works on most dogs. A pup a few days into a habit is the easy end. A ten year old who has used the same corner for years takes longer and needs the routine alongside it. Give it a fortnight on the actual spots. If he shrugs at it, you get your money back.
Spray the surface, never the dog, and let it dry before he comes back in. Keep it off bedding, bowls, toys and anywhere he sleeps, and away from his face. If he licks a treated surface and then seems unwell, stop and call your vet.
No. Please do not. The aromatic ingredients that put dogs off are ones cats cannot break down the same way, and they appear on poison control lists for cats. If a cat walks the same floors, this is not the product for you and we would rather lose the sale.
Every one to three days at first, then taper as the habit breaks. It fades faster on carpet than tile, and much faster outdoors after rain. If the spot gets used again, go back to daily for a week.
It should not, but finishes and dyes vary enormously and we cannot test them all. Try a hidden patch first, under a cushion or the back corner of a rug, and give it a few hours.
On bins, wheels, gate posts and decking, yes. Sun and rain break the scent down fast though, so you will be spraying far more often. Indoors is where it earns its keep.
Only in that it is easier. The habit is days old rather than years old. Same rules: surfaces only, let it dry, and take him to the right spot on a schedule so there is somewhere better to go.
Tell us within 60 days and we refund the order. You do not need to post a part used bottle back. We would rather refund you than have you keep spraying something he is ignoring.
Getting it right
Four steps. Skip the third and it comes back.
Enzyme cleaner if you have one, and let it dry completely. Spraying on top of a fresh mark just stacks two smells instead of replacing one.
Damp, not soaked. Let it dry before he is allowed back in the room. Three or four places, not the whole floor.
Out on a schedule, and reward him the second he goes in the right place. This is the step people skip and it is the one that makes it hold.
Every one to three days at first, easing off as the spot stops getting used. If it gets used again, daily for a week.
Sixty days to find out if the spot goes quiet.