lol, I'm afraid crawling in won't help much either
it reminds me of a cat behavior "tip" I heard about once. A male cat was spraying urine all over the house and someone had told the husband there that the cat was challenging his domination or whatever, and advised him to pee in the cat's litter box. (No, it didn't solve the problem and should NOT be done).
Details about the history of the cat could help shed light on the problem. I have seen this happen in cats who were raised without a litter box. These were cats bred and sold by unethical breeders who simply kept the cats either in cages or in a room with no litterbox (where they would wash the feces and urine off the floor once in a while
). I have also seen this happen in cats who have been declawed. The pain in their paws when trying to use the box for the first time after surgery, made them stop covering (and sometimes just stop using the litter box altogether). I have heard it said that some orphan kittens simply never learn to cover up, because they have no one to learn proper litterbox routine from.
One thing you could try is set up a second litterbox with a different type of litter. Try something with a different texture, perhaps one of the natural litters made from wood, recycled paper, citrus peels, corn cobs or some other substance. You may have to try several types before you find one that your cat is willing to use to cover up with, if at all.
One thing to remember is that some cats just never cover up. For whatever reason, your cat may just be one of those cats.More about litterboxes and litterbox issues here.