[wingnut60]

This is the most disagreeable part of the RV life, but can be managed well without much odor. Flushing would go much better if the jet was lower in the tank--it misses most of the buildup. Looking down the toilet with a flashlight is the best way to assure the main buildup is gone, and a quick pour of lots of water down the toilet is one of the best ways to dislodge the solids. I usually let the tank fill most of the way before flushing and takes over a week with only the two of us before reaching that point. I always let the fluid level rise to the flush jet before opening the dump valve, then repeat and repeat until clean. Using a bag of ice, about 10 gal water and some Dawn/Calgon while moving to the next campsite will always finish anything the flushing missed. The only time I have an odor is when the vent fan OR the interior vents are in use while the toilet valve is open. And the tank sensors are useless also.