Just replaced esc and opened Naza module for inspection. I can't tell if water got in it or not, but afraid to use any amount of air on the barometer(small unit with two holes on top). I used a q tip barely damp with alcohol to wipe across top of it, why I don't know. Anyhow, put all back together and now does not drift and change altitude as before. I almost think it performs better but that may be wishful thinking. It does make a different sound when going full speed forward or reverse (100-150'), a fast wa-wa-wa.... capg
PS Since this was my second crash into water, I sprayed electro-seal onto circuit board of battery, top and bottom and started having issues. The spray must of seeped into the connector, after cleaning the pins and female plug several times with alcohol it resumed working. The drone itself seems ok as is as long as you can get dried out in a timely manner, I used compressed air and GPS module as well.