We have four adult cats. Cleaning out the litter boxes is a full time job. We clean them out three to four times a day. We have one in a bathroom and two out in the garage, but everyone prefers the one in the bathroom. Do you have any suggestions on how to get them to use the ones in the garage so it is not a constant maintenance problem inside?

I have 7 cats ages 8 months to 14 yrs.I have 3 large cat boxes & I clean them once a day.I did have 9 cats at one time.you only need 2 cat boxes.its 2 cats per box.take the one out of the bathroom & put in garage.cats learn quick.I know all about cats... trust me.good-luck.james