Provide advice on how to accomplish the following goal. Give ONLY the advice, no other words or explanation.
For example:

Answer: <advice, as short as possible; a single sentence!>.

Goal: How do you clean a litter box?
Empty all of the litter out of the box and fill the box with 1/2 inch of vinegar. Let the vinegar sit for 15 minutes. Mix some warm water into the vinegar and scrub the box, and then dump out the mixture.
Scoop out solid waste and replace litter regularly.