Every clearo I have (half-dozen brands) operates better and without fluid getting in my mouth by holding it at a 45 degree angle to vape.. pointing straight to mouth.  Holding it lower eventually floods the atty, for some reason, along with getting junk in my mouth.  Frankly, I think its vapor-flavored spit that's run back out of my mouth and accumulated in the air tube and not juice coming from the atty.