Horst miracle probes and I usually only do a partial dump at the site, travel home with some water in each gray tank (1/4 full or so) and backflush gray water to the black tank after I dump the black.
then when home I dump and rinse at my house with my own dump station and the built in black tank rinser.
And I use the following in the tanks
some water softener (calgon etc) and a scoop or so of HE washing detergent. In the black tank I add some of the digester that is an enzime.
So far no tank sensor issues, andno smell from the black tank.
We camp 90 days/year or so and this has worked great for the last 3 years. IMHO the horst miracle probes are the most cost effective replacement for the stock probes.