Chaparral 381RD Sewage smell
Hello everyone. We have a 2018 381RD. Just got home from a week trip to a county park. Didn't have full hook ups (but I don't think that would've mattered). Noticed a sometimes strong sewage smell coming up from under the bathroom sink cabinet. Never even had the black tank 1/2 full. When we noticed the smell, I did empty the tank and put a new bottle of blue treatment in. Smell seemed to get a little better, but was still there the whole trip. Any ideas where it would be coming from, or why? Not coming from the toilet...
Thank you in advance!!
2018 Coachman Chaparral 381RD 5er
2018 Rockwood A214HW Hardside Popup "Triangle"