No way. No time for cleaning coins. Basicly just wash off the heavy dirt and spend it. Most of the quarters in that pic are now owned by the New Jersey Turnpike, Garden State Parkway and Tappanzee bridge authority LOL. Every once in a while I get a dark quarter like those in change from a store and I wonder if I had anything to do with it. I'm just doing my part to put all that lost currency back into circulation.
I once heard that there were more coins beneath the ground than there are in circulation. I tend to believe that's true. HH