I've had this problem several times in my MK3, and it's a pity Honda haven't fixed it for the Mk4. The fix would be to include a small anti-condensation heater inside the pod. Only once did I get the "camera obscured" warning, the other times I just became aware that some things, such as the headlight auto-dippng, weren't working. There's a tiny drain hole to get rid of the water, which results in an annoying dribble down the inside of the screen.