With all do respect to the nail tech in the CND video, this is a perfect example of an over exposure issue. She instructs viewers to leave the liquid in the brush "because you will need it later" and proceeds to flood the lateral sidewalls of the nail with liquid which is clearly visible on the video. In defense of myself, I release excess liquid from the brush before I even place the bead down, and continue to dry it every time I reshape it back into a point. Now this is, of course, my own opinion just as the lady above expressed her opinion of my (dry) brush touching the skin and nail plate being an over exposure issue. Because until someone comes up with facts proving what the limit is on over exposure, it is all just an opinion.
Creative and CND are now and have always promoted the use of excess liquid because that is how their product works. Back in the 80's and the early 90's they actually promoted the idea of dipping your brush back in the liquid and adding it to the nail, until people started getting sick and they had to rethink their approach.
In my opinion, no one should have to use a product so wet that liquid runs all over the finger. But, of course, that is just my opinion.