You never have to wash your dog bed cover in the washing machine. In-fact you never need to take the cover off. Our beds can be wiped clean with just a towel and warm water. Moisture will not penetrate into the memory foam.
Once a month you may use a 1:4 mixture of vinegar and water solution to disinfect the cover. Simply spray the solution, wipe clean with a towel and air dry. It’s that simple.