Question: Some of my tuning pins keep slipping. How can I correct this problem?Tuning pin maintenance is something you should do every time you tune. If the pin is too tight and difficult to turn, you need to pull it out a little bit with the tuning key while bringing the string to pitch. If the pin is slipping, it should be pressed inward while turning the pin. Loose pins may require a bit of muscle to twist/grind the pin snugly into the harp neck. The advice to “push in your pin” is meaningless unless you add a twisting motion to set the tapered pin snugly into the tapered hole.