I used to use baggies and all the other tricks and the water still got in if I dunked a plane. Then I discovered Corrosion-X. Now, like Crash-RCU, I just open the case of my RX and all the servos, dunk them in the Corrosion-X and hang them up for a while to let the excess drip out. That's it. The RX and servos will still work even if completely under water. The stuff is just great.