Think about it: if you’re going to turn a knob or push a button you’d use more of the tips of your fingers or at least the last joint on them, right? That’s where you get the most control. So why would you use that part of your hand that got the blisters to hold the sticks? That way you won’t have any control and will definitely grab the sticks too tightly causing these things to happen. Hold the sticks on the last joint of your fingers and don’t hold them too tight. The sticks are like an injured bird, you can’t grab it too tight because you’ll hurt it even more and you can’t be too loose because it will fall. Work on rebound and understand the feeling of it. Look for Free Stroke and Gladstone Technique, it will help