Rule out a medical issue with a vet visit
Clean accidents immediately with an enzymatic cleaner
Avoid ammonia-based cleaners
Remove or replace soiled carpet padding if needed
Provide more litter boxes
Keep litter boxes clean
Use unscented, low-dust litter
Place litter boxes in quiet, accessible areas
Reduce stress and household changes
Block access to favorite accident spots
Use waterproof carpet protection or mats
Feed and play near problem areas to change associations
Add scratching posts, hiding spots, and vertical space
Use pheromone diffusers if helpful
Reward litter box use
Reintroduce litter box training if needed
Consult a vet or behaviorist if the problem continues