My cats pee on things like shoes, plastic bags on the floor, socks on floor etc when the litter box is not kept sparkling, so that's essentially every day or every other day.
Once you get the smell of cat pee in your nose, combined with the fact that you can't really trust yer kitty anymore you seem to smell it everywhere, I hear you on that!
Your vet will be able to determine if there is a medical condition (ie another bladder infection) but what are you going to do if this continues?