Greetings,
In case anyone is wondering this is what we have found so far, we thoroughly cleaned both tanks with some Dawn dish liquid filling and letting each sit for a day then rinsing out good, we started at the top of the vent pipe outside and traced all the way down,nothing is loose or wet, there is good airflow all the way up the vent pipe, the drains don't smell all is good there there is nothing organic but what we think is the cause is lack of air circulation under the dinette benches and with the help of some Ozuim the smell is about 90% gone and rite now we have the bathroom for blowing out, bathroom door shut dinette benches open,windows open and the smell is all ending up in the bathroom so not knowing what is cause or effect for sure we are going to put in some vents and a fan or 2 in the dinette benches, it only smells on the driver's side even in the storage compartment in the back. It wont hurt to have more air circulating, the downside to not full timing I guess or maybe its not that and its wishful thinking. We do appreciate all of your comments we checked everything you all mentioned (no dead mouse) so thanks!!!
NHBoomers