Trouble with electrical system

I do have the delay in the system. The smoke was more like a puff, but enough that my wife who was standing behind me noticed it along with a loud pop. We purchased the 2005 cross country 372DS by coachman 3 weeks earlier. In preparation for our upcoming trip I was checking all electrical systems,shore power, geni and coach battery. As I mentioned earlier and to my surprise, everything still works. My only suspicion is that the dealer, when cleaning the coach for resale, used a pressure washer and something like "Armor All" every where including the storage compartment where the inverter is located. It's really sticky and shiney, but clean :-). I know the water would have evaporated but possibly the "Armor All" treatment collected on the circuit breaker and momentarily shorted out. Just a theory.