I've tried many of the products you can get over the last 10 years, as well as the GEO method, and even driving around with ice cubes. Darn sensors don't seem to care what you use, if they are the cheap ones.
The only issue we've run into other then the sensors, is the grey can stink near as bad as the black. When we dump the tanks we put chemicals into both, with the grey getting a half of what goes in the black.
FWIW, we're currently using Happy Camper. https://www.amazon.com/Happy-Campers.../dp/B005XEFADU
Something to keep in mind. Depending on how your unit is plumbed, if you put the chemical in the tank right off, it goes down the dump pipe, and stays there.
One of the clear elbows lets you know when the tank is clean, kind of gross, but at least you can tell what's going on if used once in a while. That's how I noticed the chemicals were just sitting in the pipe.
Mine has a back wash, but they make them as with just the clear elbows.