I don't think you're the only one, Willie. I've been fighting with an SS430 build in an Aromamizer on a 250C. Finally gave up and switched to watts mode, let everything cool to room temperature, fired with no atomizer, screwed in the Aromamizer, answered "yes" to new coil, locked ohms, found a nice vape level and started replay. So far it's been working perfectly but I do wonder what the heck is giving it fits in TC mode.
I'm a little OCD with my mods to begin with. Every time I fill a tank I wipe the whole mod down with 91% IPA and pay special attention to the 510. I rarely see anything on the paper towel after cleaning the 510, but once in a while there's some black oxidation and it seems limited to the very bottom of the thread area. Then, I wipe the atty down the same way, just to be sure everything is as clean as I can get it.