Nothing gets in! The high quality interior of your pilow, mattress or comforter will remain as clean as when it left our advanced manufacturing facility - for years to come. But you should still care for the exterior...using a moist cloth and a little mild soap. We recommend that you do this every time you change your pillow case and sheets just to ensure that all organics and contaminants are removed from the soft surface. Or....our CEO is known to take his pillow into the shower with him. You could try that. Just dry it off. Or you could take it into the bath - and use it as a comfy back support. I've tried that a few times. Makes for a relaxing bath. Again - just wipe it off and dry it off. Coming soon - we are working with a global environmental cleaning company from Canada to develop a bespoke mild cleaner that is organic, fragrance-free and free of any preservatives. It will be a prepackaged container with single use wipes that can be composted. We hope to have this ready in a couple of months and included with each new purchase, as well as being available for purchase in our store. Our goal is to ensure that you have the cleanest and healthiest bedding available. If anyone has any thoughts on the cleaning wipes that we are developing - please leave a note below. Thank you!