I just got my temp controller for my Keezer today and I am not really sure how to use the probe for best results. I searched the forums and there are some threads but a lot of them are older. I first put water in a glass bottle and submerged the probe but then freaked out when I saw threads that said the probes were not water proof. I now just wrapped the probe in a single layer of bubble wrap and wedged it between two empty kegs. I don't have anything in there yet but I am trying to set the temp to 67 for fermentation of my two wheat ales that I currently have sitting in my hall closet. I want to make sure the temp is right before I put my fermenting beer in there and mosey on off to work tomorrow only to come home to frozen wort. I heard the gel pack theory but I don't currently have one and that's all I have heard that sounded good. I ordered a kit from Midwest the other day so I believe there will be a gel pack in there for the yeast I could use. One good idea I heard was using a prescription bottle and filling it with the gel and drilling a hole in the top for a probe. I thought the submerged in water idea was the easiest but I am worried it will mess up the probe. What are you guys doing with your probes...lol