I did same thing last week, lol. Was pretty mad at myself. Lesson learned I hope.
One morning I just woke up and was getting ready for work. It was still dark in the room. In a still-tired stupor I tried to fill a T3 without unscrewing the base. It took me a while to figure out why the damn thing wasn't filling until the juice all over my hand clued me in.
Was on break at work, reading and vaping. Decided I wanted to change up flavors, so I unscrewed the T3 I had on battery....and unscrewed tank from base instead of base from battery. Full 2.4ml of juice everywhere including my book.
I hate Mondays.