There are severale methodes to clean your tank and sensorse, not sure if any of then really work all that well. I have been told to poor a bag of ice in the tank while traveling and let it slosh around, then drain tank when you arrive at destination. DW has her own methode to clean the tank and sensorses, she adds abount 3 to 5 gallons of water THEN adds a cup of tide detergent just before we travel, then I drian the tank when we arrive at destination. Can't speak to the ice methode but the tide methode seems to work fo us. We do the tide thing everytime we move the BH.