GE Profile side by side refrigerator-freezer...

Question

My refrigerator-freezer was installed in 4/03. Both sides maintain perfect temperature. However, snow forms in the opening from the ice cube container to the in-door ice cube/water dispenser. I have tried emptying the ice cube container and cleaning the opening, but it just happens again. The temperature is set at zero; the door is not opened frequently. No odd noises either.