You can spend hours flushing/rinsing along with lots of $$$ on sensor cleaning products trying improve their accuracy & will have wasted both. I've had several different RVs in the past 40+ years & have yet to own one that those sensors were worth the voltage to illuminate the pretty red lights.
Learn the "burp" sound when flushing the toilet that will indicate it's about time to dump & ignore the sensors.
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Fulltimed 10+ years
Sold '13 Thor Redwood 36 FB
Traded '13 GMC Denali DRW D/A
Replacement undetermined
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