Love it but...one design flaw

I love the look and it works great... as long as I monitor it. I have this on my desk at work and it is very attractive, completely silent, small, easy to use and the mist has put a stop to my dry cough from low humidity due to the building heat in winter. BUT, for some reason after three days of use water has started accumulating on the top. About every 2 or 3 minutes I have to wipe it off or the water will build up to a point where the mist can't get out.

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