If your rosettes are sticking to your iron it's because the batter closest to the iron isn't fully cooked. This can be an indication that the iron wasn't hot enough when it was first dipped into the batter. Solution: Allow the iron to heat up for 3-4 minutes before dipping it into the batter. If it's hot enough, it'll make a sizzling sound. If you're sure the iron was hot enough, it may be that you need to let the rosette fry just a little longer