I’ve been decarbing in the roto for years it’s rhe only way to do it, the moment I see the squiggles comin into my etho I dump it to keep them anything after that I just use to clean glass I don’t want to keep compounding terps in my etho. That usually is around 75-85c as soon as that happens I turn my temp to 145c and by the time it reaches that temp it’s done decarbing and you strip a lot of volitales as a bonus.