I'm trying to find the best way to control my temp in my chest freezer for fermentation. I have a temp controller with the probe in a bottle of water. I've noticed that by the time the freezer cools that bottle of water down to the desired temp, the freezer itself is WAY below the temp I want causing that bottle of water to continue cooling going well below the temp I want. Then it takes forever to come back up to my desired temp. This just causes too big of a temp swing. Any ideas on where to put the probe to keep it within a few degrees at all times?