I recently tried a Tiger Sniper. The first one wasn't installed correctly so I had another put on. It worked well for a couple days then got really hard and I couldn't get it to hold chalk. So I went back and had them put on a Moori Med. Now I am having the same problem with it. Seems like I have to scuff the tip every 5 minutes or else it will just glaze over. I can hardly get through a rack without a miscue. What am I doing wrong? Is it the way I chalk? Am I just hitting the balls too hard? Should I try a different tip?