Hi, I notice this as well, it starts every year when the temp drops. I just keep my shop around 72 while I am pouring, and it helps quite a bit. I am sure that is what is happening for you, too. I was so frustrated when this first started happening, and couldn't figure out what it was. Also, we get tunneling and huge air pockets in our candles if the shop is too cool. Soooo, we just keep it warmer out there while the candles are setting up, and it's all good. I also have issues in the extreme heat of the summer, too. I have about a month where I cannot pour candles unless I do it in our house, which isn't going to happen--LOL. Our shop just cannot cool down enough for me to pour anything saleable in that timeframe. My candles just look like crap if I pour in that heat! Soooo, we just pour extra for that time and plan ahead.