Wash the foam rubber in the washing machine in lukewarm water and use regular laundry detergent. Don’t overload the machine. Depending on your machine size, you may be able to wash two foam rubber pillows at a time.
Stop the washing machine in the middle of the cycle. Reposition the foam rubber in the opposite direction.
Add a non-chlorine disinfectant to the rinse cycle. Follow the disinfectant manufacturer’s instructions regarding the amount to add.
Air-dry the foam rubber in a warm, well-ventilated area. Allow it to thoroughly dry