Trials and Tribulations and Smell

We've had our 177 since April and have taken 6 trips with it. We love the camper and the lifestyle and are willing to deal with a little problem here and there. Here's a rundown of issues and solutions and a request for a new problem:
1. Brakes didn't work --- dealer reconnected driver side brake. Wire was broken in axle.
2. Hot water heater didn't get hot --- friendly R-podder at next site showed me how to turn the hot water heater bypasses to the correct positions.
3. Gas stove wouldn't light up --- rubber hose to stove got crimped on slideout. Crawled under and moved it.
4. Water leaking onto floor --- sink connection into waste pipe wasn't secure and sink water was splashing out onto the floor. I secured the pipes.
5. Flimsy dividers under sink cabinet keep breaking --- move heavy stuff to another cabinet. Does anyone use netting or anything else under here?

New problem:
Had a smell at the end of our last trip (3 days long)- thought it was propane under the sink - but it could have been grey water tank. Haven't been able to get the smell to come back to fix or show to dealer. Checked AAV under sink and it moved freely so I don't think it's stuck open. Originally I thought it was the metal/hose propane connection under the counter by the stove. Not sure now. Any ideas???