If you mean in the cup where the coil is, I have the same issue, but only with some juices. Other juices they stay pretty clear. One "Creamy Carmel" juice gets very big brown clumps around the coil and wick in the ceramic cup. I actually had to clean and dry then pick it off with a sewing needle after a dry burn. Needless to say, I've stopped using the "clumpy" juices in my clearomizers.