Cloudy gear is most likely due to moisture as stated earlier, it was either in the powder when you got it or it got in while you were making it, high humidity will cause gear to turn cloudy. It takes heat to clear it up, you will notice on the vent pin, if you use one, there will be water on it inside the vial when it gets heated to the point that the water evaporates, the vent pin will help to let the water vapor out but it is a long process because it is very hard to get all the water out and there will always be some left in it. It only take 4 drops of water to cause a whole batch of gear to turn cloudy!!
Thanks
TMM