A buildup of solids in an RV sewer tank is a bad thing. So getting rid of the yucky mess should it occur is a frequent topic of discussion among RVers. Most of us have heard that putting ice cubes down the toilet will do the job. The idea is the hard cubes will bounce around when the RV is moving, banging all that nasty buildup away. So does it work? James of the Fit RV ( http://fitrv.com ) wanted to find out. See the results in this very interesting and enlightening video.