My first 40ct "puck" did the same thing. I only use the 50/50 stuff now no water. It's expensive but I've paid too much for my cigars to have them mold.
I took the old "puck" apart to see if I could put gel in there but they don't really go back together.

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I am the rocks of eternal shore: Crash against me and be broken!~ En Sabah Nur