When I need to cure my black tank sensors out comes our trusty tank wand. About every 4th trip out I use the tank wand after dumping and black tank sensors are good to go. It will last a few outings before they get enough accumulation fouling sensor's accuracy.
It's amazing how much residual waste is removed when using the tank wand although we have filled and dumped black tank repeated times. Mostly use tank wand at home where we are fortunate to be able to dump our tanks, makes the process quick and easy.
