Sawdust spawn residue can build up in your tool, making it feel sticky or causing the plunger to freeze. If this happens, soak in hot soapy water for 30 minutes, then push down on the head of the tool to loosen any debris.

Periodically check the head of the tool to make sure it is not coming unscrewed. The tool can be tightened by using a large flat head screwdriver. Insert the screwdriver into the groove on the tip, hold onto the head and lightly twist the screwdriver until tight.