I worry about the backing coming off sponge pads in a washer...I have great luck with all my pads in one of the pad detergents sold here, or simple laundry detergent and then rinsed very well...
Ziggo thanks for your post I just did a load of pads in the washer after my last detail & had 2 pads separate from the backing both were new pads for this detail job I cleaned the pads with my universal pad washer & dp pad cleaner then I figured I would throw them in the wash just to make sure they were fully cleaned & rinsed all my pads make it except 1 gray kompressor 6.5" & 1 crimson 4" pad backing separated was told not to put these pads in the wash and they wouldn't replace don't mind that just funny how lake country has it listed on their website but everyone says not to put them in the washer to clean
Mine all get machine washed, never a problem. Sometimes they'll soak in a bucket of Oxy & water for a day or two before they get washed. They are all LC pads of various types.