First let me say that I love this product. I think this is the best thing I have ever bought for scuba. I have two questions. 1)My Moisture wick on the bio filter looks dirty from the charcoal filter. How can I clean it? 2)I would also like to know should I store the wick dry or damp. When the Moisture wick is dry it gets rock hard. I don't remember it being this way out of the box. Thanks - Rob