Only if it gets to the electronics board and make a bridge between 2 solder points. I would suggest to not use it for a while and let it dry. You could also take a look by taking the 4 screws out of the back of the remote.
Probably, the rebar in my driveway messes with it. I would assume so. If you have access to a 3D printer I'll bet you could make a plastic hinge. I haven't looked but they probably have one at menards or somewhere like that.
https://www.amazon.com/DJI-CP-PT-000312-Phantom-4-Quadcopter/dp/B01CFXQZD0/ref=sr_1_3?ie=UTF8&qid=1482552688&sr=8-3&keywords=phantom+4
Or just get the Mavic, it does all the same stuff and is a lot smaller.
The flight log said RTH failed like 3 times from me trying to RTH then finally about 1 minute later it said Signal Lost, Aircraft Returning to Home. Surprisingly it have no log entry when I actually did lose signal. Mybe I should have tried flipping the s2 switch twice instead of using the app.