I wash quite often in summer, not so now (as it's somewhat dusty, but not sweaty/dirty). What I do is I soak it in big bucket with soap added for 10 mins, then do the hand-clean/rinse with the hose. Because those pads are much lighter that western, it's quite doable. You can use washing machine too (I did for show pad that is also by Roma and wasn't all THAT dirty after just one show), but I don't feel like throwing such a dirty one I use every day there.
"Life isn't about waiting for the storm to pass: it's about learning to dance in the rain..."
"When we are no longer able to change a situation - we are challenged to change ourselves."
"How people treat you is their karma; how you react is yours."