Ehrenpreis' "Clowns Like Me" is sad, but true, and with the help of writer and director Jason Cannon, the brutally honest tale finds all the humor that's possible. Within a very few minutes we are introduced to all the tools to discuss an obvious manifestation of his obsessive-compulsive disorder: cleanliness. Out come the goggles, gloves, cleaning rag, spray bottle and his co-stars Swiffer and Dirt Devil in this ela…