And no cleaning your rabbit's cage twice a day is not crazy if:
Your rabbit has about 100 to 150 droppings a day, makes messes with the hay, there are droppings in the hay/food, does not live on a wire cage (therefore droppings stay in the cage with the rabbit) and your rabbit does better to go to the litter box when the cage is cleaner. This of course also keeps them much cleaner and most importantly, safer.