Besides water, an RV gray tank (or "grey" if you trend more British) takes in lots of greasy, sticky substances. These include food particles & residue from preparing meals and washing dishes, soap, shampoo, toothpaste & even body oils. After a while, it can gum up your holding tank sensors, causing a false reading on your tank monitors.

Read more on our blog: https://www.thervgeeks.com/graytank...

Cleaning out the RV gray tank and tank sensors is a really simple task, since there's a readily available liquid designed to break up all of the crud that can build up in the tank: automatic dishwasher detergent. The gel type is easy to flush down the drain, and goes right to work breaking down and dislodging greasy buildup.

To calibrate the holding tank monitors in your RV, follow the steps outlined in our video:
   • HOW TO: Calibrate RV Tank Monitors  

To clean your RV gray tank, simply choose a day when you're about to take a long road trip to a full hookup RV park. Just start off with about a halffull gray tank, pour about one cup of automatic dishwashing detergent gel into one of the sinks, and wash it down the drain with plenty of hot water. Then spend a few hours on the road, allowing the sloshing action in the tank to work with the detergent to break up any nasty gunk that's accumulated. The longer and twistier the road the better, but a few hours of agitation should be plenty.

Once you arrive at your full hookup campground (a dump station will of course work fine as well), simply pull the gray valve and dump the tank. All of the greasy gunk that was stuck to the tank will get flushed out with the water.

If your "3/4" or "full" light is the one staying on, start your trip with a fuller tank, which will ensure good water agitation on that sensor. But since the heaviest buildup is generally in the lower part of the tank, 1/2 tank or so should provide a good combination of water and empty space for strong agitation and sloshing as you drive.

If the first try doesn't clear up the problem, just try it again on your next long road trip. It's so easy and inexpensive that another attempt is no big deal. Once your tank is clean, your sensors should work fine and any odors you may have been experiencing should be eliminated or reduced as well (yes, gray tanks can smell too).

The piano music is my own performance of Scott Joplin's Maple Leaf Rag from 1899.

WONDERING WHAT'S THE BEST GEAR TO USE ON YOUR RV?
Here's all of our favorite equipment that we use ourselves and recommend to friends:
http://thervgeeks.com/ourfavoritegear/

Join us at http://TheRVgeeks.com for more great RVing content!

FullTime RVers since April, 2003, we share DIY (do it yourself) RV maintenance, repair, travel, upgrade and operational tips & tricks.

Many RVers are eager to learn more about using, maintaining and caring for their rigs. We hope our experience can help others go DIY, saving time & money, plus the satisfaction of a job well done.

We're handy RVers, not professional technicians. We're happy with the techniques and products we use, but be sure to confirm that all methods and materials you use are compatible with your equipment and abilities. Regardless of what we recommend, consult a professional if you're unsure about working on your RV. Any task you perform or product you purchase based on any information we provide is strictly at your own risk.

We sometimes receive products for evaluation at no cost, and The RVgeeks participate in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. But our opinions are our own, you won’t pay an extra penny, and we only link to products we personally use, love and can recommend to friends with complete confidence.

Comments welcome! Thanks for watching! Don't forget to subscribe! #RVLIFE #RVDIY #RVLIVING #FULLTIMERV #RVREPAIR #RVMAINTENANCE #RVMODS #RVUPGRADES #RVTRAVEL #DIYRV #RVGEEKS