Now dip those things (ESC and RX) in Corrosion X. Soak them for a while, dab them off, and re-install in the plane... Take a look into the RC/Corrosion X info out there, you will even see video of servos working when they are under water with the RX also completely submerged...
I started using this stuff when I got tired of re-bagging my electronics for the float fly season.