@RWB - This is where that part of the testing starts. So far, if you open a bottle of vodka and place it near the top of the bottle, it spikes the reading to 3500-4000. I need to test sensitivity when distance is applied. Also, the methane gas is where I have no easy way of just “testing” it 
– which brings me to the end goal: strap this on the outside of a diaper and get alerted when it needs to be changed.
Hardware wise - I need to add a pin from the basic boost battery notify to the photon, and check it on startup to see if I should do a “last notify” (that the battery needs to be charged) + a long long sleep – assuming this is the best I can do for a “shutdown”. Also, again - I really want to create a custom PCB for portability, so at the end of the day, I can just velcro this thing and easily snap it on and off.