*hears an eagle screetch* *plays theme music from the good the bad and the ugly*
but ya, you could prolly wash them out with soap and water, just make sure they are completly clear of soap and fully dry before you use them again or... else
I have a dremel too, and i dont think the polishers would last too long if you got them wet, even if you dried completely. I have always liked to polish by hand and leave the cutting to the dremel. Best way to know for sure if they are washable is to contact the makers of the dremel.