He originally used to go outside but i moved into a flat 2 years ago so he uses the tray. Thing is he tries to cover up his "crap" but completely misses the litter - instead catching the edge of the tray. I got a bigger tray but it makes no difference. Its like once hes done his thing he wont stand in the litter. In the end my other cat covers it up when she needs the tray. I dont know what else to do - this has been going on for nearly 2 years. It was funny at first but its beyond a joke as everytime he catches the edge of the tray its really noisy so if in bed it wakes me up.