I went to feed the bees yesterday and I heard a wired noise in one hive only. I thought it was the syrup running down within the hive but I pulled the jar out and it was still making the noise. So today I went out to feed again and the noise is still going on. It sounds like something is rubbing on the wood but to the effect that water is pouring down inside. Its only in one hive. My wife says its the bees smaking thier lips, Im not so sure. Any ideas??