2014 Sunseeker 2860dS

[ramehrer]

We are spending a month in our RV and all of a sudden both of our holding tank sensors are displaying FULL.
I have purchased a tool for cleaning the Black Tank sensors but how can I clean the Grey Tank Sensor?

Thanks.

[SeaDog]

What has happened is the scum has built up on the tank walls causing the seniors to give false readings. You can get some tank cleaner and follow the directions to get them clean and then thing about using the geo method to keep them clean.