Washing machine and air dry
I personally wash gel/memory foam with water hose and very selfo
i handwash my sheepskin thinline one but machine wash my ogilvy half pads and air dry both.
For my fabric, wool, sheepskin half pads I put them in the wash with the MOST organic and "okay for pets" detergent I can find. For half pads that aren't made out of fabric and are made out of rubber and stuff, I just rinse it with water and put some hand soap/horse shampoo on it, give it a scrub and rinse it off.
I just throw them in the wash
I wash my sheepskin one in the washer and just follow all the directions!