[cdat]

I've never tried this, but have been told that once you empty the tank dump a bag of ice in the tank, then drive around for a little bit supposedly the ice sliding around breaks up any solids left behind, then you fill the tank about 1/4 full and dump normally. Personally, I've never found a need to use a deodorant in the tank, just make sure it is properly vented past the roof line. I fill the tank about 1/4 full with water after dumping so the tank never really "dries" up.
John