Black tank showing 1/3 full after emptied

[tsduke03]

We used our 23B for the first time this last weekend. Everything worked great, but I noticed after dumping that the gauge still shows 1/3 for the black. How I tell if it's just something covering the sensor or there is actually crap(no pun intended) still in there?

[Crabman]

Here is a similar discussion going on about black tank sensor reliability. Or lack thereof.

http://www.jaycoowners.com/showthread.php?t=7160

[tsduke03]

Thanks and sorry. I actually should have look and searched for and for some reason I didn't this time. I usually do first.

[drfife]

My trailer is over 9 years old and the black tank sensors still work great. I have a No-Fuss-Flush black tank rinse system. After every dump, I add about 5 oz of Blue Dawn Ultra dish washing liquid. I only dump the black tank when it is over 2/3 full, even if that means leaving "stuff" in the tank for a trip or two. If possible, I dump the tank upon arrival at a park. There is never a line at the dump station on Friday.

The grey tank sensor is unreliable on my trailer. I attribute that to no flush system. Next trailer I'll have a grey tank rinse system installed in addition to the black tank rinse.

[wb2nco]

I'll post the same question here.. Can you remove the faulty sensors from the tank and clean them off?