It is a good idea to clean your mattress cover at the same time as your foam mattress. Look on the label of the mattress cover to determine the washing cycle. Likely, you can put in a normal wash cycle. [3] X Research source

If it is dirty, you should remove all of the bits of fabric and dust from the upholstery attachment using your fingers. Then, wash it with soapy water. Rinse it and then let it dry for twenty-four hours. [5] X Research source

Never saturate the mattress with water or a cleaning agent. Instead of using a steam cleaner or a wet rag, you should use a spray bottle. You are less likely to get the mattress excessively wet if you mist the mattress with a small amount of water using a spray bottle.

You can use a mix of half white vinegar and half water in a spray bottle. You can sprinkle baking soda directly on the stain. Follow the directions on the bottle of enzymatic cleaner.

If you rub the cleaning agent around too much, you could end up spreading the stain.

You should avoid scrubbing the stain with a circular or aggressive motion, since this approach could cause the stain to set. You may need to use many rags or towels, depending on the size of the stain.

If there is a window in the room, you could open it up to improve air circulation and speed up the drying time.

You can make your own citrus based cleaner. Put some orange or lemon peels in an airtight container. Fill the container with white vinegar and let it sit for two weeks. Then, strain out the orange peels. Put the liquid in a spray bottle and clean. [16] X Research source

Remember to bring it back inside and keep an eye on the weather, since you don’t want to get your foam mattress wet. If you live in a city with a lot of air pollution or traffic, you may want to skip this step.

If you tend to drink a lot of coffee or wine in bed or own a pet, you may want to use a waterproof mattress cover. A waterproof cover will help you avoid the disaster of a soaking foam mattress. [19] X Research source