Get the stuff Corrosion X in the pump spray bottle and open the case of your receiver, servos, and anything else that is electronic on your boat and spray the circuit boards top and bottom and (even the gears in the servos because it is also an excellent lubricant) wipe off excess and you won't have this problem. I was recently turned on to this product from an old RC boat modeler magazine. I studied electronics in college and know first hand what corrosion (caused by moisture) can do to any circuit. CorrosionX will bond to the surface and put down a microfilm (extremely small layer) of an oil-like substance that will last for quite a while (not sure how long yet-still there after 3 months of running). This film is non-conductive, waterproof, and will stop corrosion causing electrolysis. Its well worth it.

One word of caution - Not For Electric Motors. It won't wipe off, so it will interfere with the contact between the brushes and the motor. That's it - Use it everywhere else. Puts a good shine on already polished metal surfaces too. Use the general purpose/marine in the red bottle - You won't be dissapointed. www.corrosionx.com/