Wilson says you can wash a fiber bed, but it is important to do so in a large-capacity washer. If you only have a regular size washer, consider taking your fiber bed to a laundromat. If you wash it in a regular sized washer, you will need to take care to use an extra spin cycle, and pay attention to your washer, as it might jump and might also leak. Always wash king and queen sized fiber beds in a large-capacity washer. You might be able to wash twin or full sized fiber beds in a regular washer, as long as you pay attention to it.
Fiber beds have a tendency to pull in soap because they are made of material that is similar to a sponge. Therefore, you can use a full load's worth of soap, but always have an extra rinse cycle to make sure that the soap gets out of the fiber bed before the wash is over. With larger fiber beds, you might need to rinse two or three times. You can tell if you need another rinse by running your finger over the surface of the wet fiber bed after the wash is complete. Rub your fingers together after that. If you feel a slippery substance between your fingers, there is still soap and it should be rinsed again.
Wilson says the most important part of washing a fiber bed is drying it correctly. One reason people avoid washing fiber beds is because if they are dried incorrectly they will start to smell due to mildew. To dry your fiber bed, put it in the dryer on a low setting right away. Don't allow it to sit in the washer for even a minute. Move it to the dryer, even if it is still dripping. Keep the dryer going until the fiber bed is completely dry. When the dryer turns off, or when the drying time is up, pull out the fiber bed, and if you detect any wet or dampness on it, put it back In the dryer right away.
If you hang your fiber bed to dry, do so outside, or in a place that has open air circulation.