I recommend anywhere from 1 hour to couple of days of working with new tweezers to get used to them. I personally tested them all, the only reason why I haven't marked the "sweet spot" is because depending on the way YOU hold the tweezer and the angle you're working from, the sweet spot will be slightly different for everybody. Check out our instagram to see more videos of us and our clients using these and other tweezers @blackstarbeautypro
