<human>:  How to properly clean a mattress?
<bot>: To properly clean a mattress, start by stripping off all of the bedding, such as sheets and blankets. Next, vacuum the mattress to remove any dust or dirt. To remove any stains, use a homemade cleaning solution of warm water and mild detergent or a stain remover designed for mattresses. Spot treat any stained areas and allow the cleaner to sit for several minutes. Blot the area with a soft, absorbent cloth or a sponge. Finally, vacuum the mattress again to remove any excess moisture and let it air dry completely before replacing the bedding.