Black tank lights

just normal for those sensors to gum up.
bumpy

http://www.adventurerv.net/see-level-tank-monitor-709-p-536.html

check this site out for replacing those tank idiot lights.

I've been working with rid-x for motorhomes and it seems to be cleaning and keeping the sensors clean in my black tank

It isn't the sensors, it's crudded up tank walls that fool the sensors. This is true for both types of sensors - those that protrude through the tank walls into the tank and those that are non-contact and are eternal on the outside of the tank wall.
Winnebago went standard with the non-contact sensor system in 2005 and although that system works better than the old style, crudded up tank walls will still fool the sensors.
As a full timer I never found anything that worked and I tried all the stuff people swear works and nothing did.
I even made an adapter for my SILs pressure washer that sprayed sideways so I could clean the tank walls through the toilet opening. That worked for a while but with 24/7 use the walls crudded up again and the sensors started giving false readings again.
I ended up just marking the calendar when I dumped and dumping the tank again in 10 days.

"I ended up just marking the calendar when I dumped and dumping the tank again in 10 days."

Yep, that works for me. I gave up on the sensors long ago.

I used to get a full hookup site every third night or so. that was primarily for the grey tank, black lasted longer.
bumpy

I've had the same problem, it's very common.Bought an rv swivel stick from camping world,swivel head rinses the side of the tank so far has worked every time. .http://www.campingworld.com/shopping/item/rv-flexible-swivel-stik/15716

good luck
Rick

Bumpyroad wrote:
just normal for those sensors to gum up.
bumpy

I agree.

For what it's worth, I regularly and frequently use the black tank flush to keep the black tank as clean as possible. So far with a 5th wheel and 2 motorhomes, I've managed to keep them working. I carry a short dedicated hose and when I flush the black tank, hook the washing hose up and let her rip. I also will close the drain valve while flushing, but I will stand right there not wander off and drink a beer. The extra volume of water helps flush out stuff.

Some folks are just hard headed and do not want to invest on a enzyme type chemical for the black and gray tanks. The problem you are experiencing is crud that builds up inside the tanks and the sensors stop working. Enzyme that I use is called Happy Camper and the lights for my tanks have worked perfect for thirteen years. You can get it through the internet on Amazon.