My cat who’s almost a year old now just almost always will not use the litter box unless ot has been basically fully emptied that very day or maybe the day before. In the past she’s used it on my clothes but luckily she’s gotten used to doing it on the carpet or inside this old box of junk I have to throw out now that are right next to the litter box. I haven’t thrown them out yet cause I’m afraid then she’d go back to doing it on mine or my girlfriends clothes.

Some other context that might help is she was the runt of the litter and was the last one and one that took longest to actually train to she the litter box. Not sure what to do here