Sometimes, even Jack, who is normally is perfect, will sometimes just decide to go in another area. I have a few tricks that seem to work (if they don’t then I do a litterbox refresher and start from square one by confining running room.
But before I take that route here are my tricks.
1. Jack doesn’t like the box when it’s first been cleaned.(Rucy was just the opposite), anyway, for Jack I just make sure that when i do clean it his box, that I put back into some urine soaked bits of litter and some poop.
2. I cut up his favorite treat into tiny tiny little bits and basically spread in the litterbox to entice him in.
3. I get plastic placemats, cut them in half and the curve up three of the sides so that the urine will stay on the placemat on not leak over the side. I keep once side down, otherwise he’ll go outside of the placemat. but you just lift it up a bit by folding up a paper towel sheet and putting underneath in such a way that it will angle the mat the way you want it to keep the urine in.
I know when he urinates and poops, and during this time, I try to stick around those times so I can scoot him back to his litterbox the moment he goes in the wrong place.
Keep us updated on what works for you.