I got my first ecig, 510, a few days ago and since I've been using it I noticed that sometimes when I drag on it it will be fine (can't really taste the flavor but maybe i just need to get used to it more?) but then later in the day I'll add a few drops to it and take another drag and it'll really burn my mouth and throat. Is it possible I'm getting some of the liquid nicotine in my mouth? I haven't noticed sucking in any liquid yet but maybe I just didn't realize it... Has anyone else experienced this?