[bsmith0404]

You’d be surprised how much stuff is still in the tank after using the black tank flush. If you have somewhere that you can connect to sewer and give the black tank a good cleaning, you might be able to get rid of the smell. You can get the sewer connection that allows you to spray water back in from the outlet, also some of the wands you put down through the toilet work well. Fill you black tank 2/3 full with water and dump several times to get powerful flow. I’ve “cleaned” several black tanks where people always use the black tank flush.