Less than two weeks for me! I used to floss really regularly but for some reason I dropped the habit a few years ago. I just went to the dentist a week and a half ago, and since he mentioned it, I thought, yeah, let’s pick it back up and try to reset the habit. I already hate the feel of not flossing after brushing; it just feels so much cleaner! Can’t believe I ever dropped it. I must have been going through a spell of exhaustion.