While I have a BTR, I am not a fan of using it. What works for me, drain BT, follow with a bucket of water down the toilet, close BTV, add another bucket (about 3 gals) for the trip home. This keeps the water sloshing/cleaning the sides/bottom of tank while traveling, and keeps tank bottom wet while parked at home, until next use. I sometimes add to galley tank, after draining too, to help clean the tank, while moving on the way home, also not allowing the galley tank crud to dry/stick to tank bottom.
Jerry
