If you're having a hard time persuading your cat to use the litter box, it may be time to draw a line in the sand.
Most cats are happy to use a litter box because their instinct is to bury their urine and feces. But when their burying preferences include the laundry basket, the bed or the Persian rug, you've got a problem.
There's always a reason they stop using their box and it's not to make you mad or get revenge Take a close look at what's going on in your cat's world. You should be able to uncover the source (or sources) of the trouble, and make the changes that will put his world to rights again.