That's a new trailer.....2014 model
So I take it you have done some No-Nos
Either have left the back tank dump valve OPEN when using trailer
Have dumped black tank after each use with very little water in it
Have not added a couple gallons back into black tank after dumping so bottom stays wet
Are not using a full toilet bowl (+) when flushing solids
You have the dreaded 'poop pyramid'
Your tank flusher is just a sprayer in top of tank to help rinse down the sidewalls and rinse out tank.
It will NOT power flush the tank
You will need to power flush with a stream nozzle on end of garden hose down thru toilet to blast the pyramid. Have dump valve open
The RV Digest product does work.....but takes a while.
