My TT's bathroom used to smell really bad. Especially after every flush - where the tank's "stank" smell would float up the open pipe. For my TT's setup, I simply installed a 12V power fan over its roof top vent pipe. Stolen the idea from
- click here - Since the company no longer makes this "store bought" roof top power vent anymore, I simply made my own roof top vent - using 12V computer fan and some ABS piping. Very simply DIY task. For picture, surf:
- click here - Ever since installing my own 35+ CFM 12V fan over the roof's vent, my TT's bathroom area has been odorless. And, I don't have to use chemicals either IMO, this power vent should be minimum build on all RVs / TTs.
Perhaps creating / installing a 12V power vent is the solution for your TT's stink as well? Works for me...