If the screw is too far out, tighten it with a small screwdriver until it is level with the post, but do not overwind the screw, as the key may bind. If unsure, hunt down a certified repair person to fix, hold and adjust screw tensions. Wooden clarinets are often subject to cracking, a situation we all hope to avoid. Cracking can occur if a part of the wood absorbs moisture and expands while other sections are too dry; the difference in pressure may cause a crack. The same can be said of temperature. If you blow hot air through a cold instrument, the temperature change can cause the bore to expand while the external is still cold and gotten smaller. Either way, the pressure on the wood is inconsistent, and cracking is possible. For this reason, never use a wooden tool on the marching field. However, don’t panic, as cracks can be repaired. Wood is a material that adjustments over the years and with fluctuations of humidity and climate. Therefore, find out how to avoid cracking is to try to hold consistency in the wood’s temperature and moisture level.