You have to clean the bucket to brush off the dirt residue that leaves behind after usage. First of all, you need gloves to protect your hands, and then cleaning solution like bleach and water. Rinse the bucket with water the first time to let the less stubborn dirt wash away. Next, fill the bucket with a solution of one-gallon water and three-fourth bleach, and let it sit for five minutes. Then, scrub all the chambers of the bucket with a scouring sponge. Lastly, let it stand upside down till it dries completely. You should repeat this process weekly or whenever you feel the dirt is racking up on the sides.