So I've been dripping directly on the atomizer and sometimes in the cart depending on my mood. I noticed over the last 2 days that it's been getting harder and harder to draw on my RN4081 almost to the point it's like sucking on a milkshake if not a little worse. So I decided to switch out the atomizer for another one I had laying around and now it's back to normal. So it got me thinking what happened? Has anyone else had this experience? 