Definitely need to dry them out more.  Sitting by themselves can take a couple days.  I balance them, battery connector end down, on a light bulb.  Luckily, we have those dressing room lights in our basement ba
throom, so I can do four at once!  About 30 minutes should be enough.
Others often post that they use the oven at about 150 for about 30 minutes.  I haven't tried it but it should speed this up for you too!
You may still need to gently open up the center hole, pushing up from the battery end with a needle or thin paper clip, to ensure good draw.  You should be able to see light when looking 
through the tip end.  Good luck!