I want to be clear here. When in TC, whether or not you lock the Resistance, you should only see the cold resistance. It should not be varying. For example, my coils are .32 ohms. When I'm vaping, it reads .32 ohms and it's not locked. The only time it would change in TC is if the mod refined the cold resistance which would be after ~30 minutes of non-use (I'm talking about something very small, like .10-.02 ohms). For my coils, that rarely happens - if it ever does, it's after I first build them, but like I said it rarely happens.