My DJI RC was left out in a light rain.  I dried it and used a hair dryer to dry water around the joysticks.  It powers on and seems to work fine.  Should I be concerned that water was able to reach the electronics and cause the controller to subsequently fail?

Hi there. We appreciate you for bringing this with us. We're glad that there is no issue with the said remote controller after it got contact with water. The DJI RC is not waterproof, therefore, we do not recommend using the remote controller in an area wherein it will have contact with water to avoid any further issues. Should you have other inquiries, please don't hesitate to reach us. Thank you for your valued support.