+ 1
I also notice that this is a sign of the mouth full of juice problem.
When it is time for a cart refill I usually take the cart off and blow as hard as I can from the mouth end (like blowing an atomizer from the battery end) then wipe it. There is always some juice in it. I haven't had juice in my mouth since I started doing this, but I do hear the noise frequently.
When cleaning out your cart remember to pop the end cap off and clean out the resivoir. When that pocket fills up you will get juice in your mouth all the time, and just think about how old some of that juice could be if you never cleaned it out.
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