its very unhealthy for sure Stelioss. Cancer on the tongue is much possible. But I am wondering where the rest of the liquid goes when we do direct inhales. The liquid that doesnt stop on tongue. Direct to lungs?
The problem is that we inhale hard for direct inhaling, so liquid comes to tongue and mouth. I noticed the problem when I vaped with Vasilis's dripper some days before. The solution that I found is that we can inhale air from environment together with the smoke that our atomizer produces.
I do direct inhaling per time to time but I hadnt notice that problem because I use the "semi-open lips" style on Tilemahos. The "semi open lips" style allow us to adjust every time how hard we inhale via atomizer. By opening a little our mouth we reduce the amount of air that comes via atomizer and increases the air from environment. That way we have the same amount of smoke (or even bigger), but without liquid to our mouth.
I do believe that the "semi open lips" style is the solution on 2 problems. First, we avoid liquid to tongue-mouth-lungs, and second we can produce as big smoke as drippers do because of their big holes. To see if I am right, please use your dripper as you always do with a resistance at 0,3-0,4 ohm and do the same with Tilemahos and "semi open lips" style. I am sure that you will not see any difference in smoke production.
What I want to say is that there is no reason for the air to come via atomizer. It can come via environment with the same results. That way you avoid liquid to go inside you