Using the Wolfcraft MG 200 caulking gun is easy. First, open the semi - open shell and insert a 310 ml cartridge of silicone or acrylic. Close the shell. Hold the gun with the ergonomic handle and adjust the rotating grip sleeve to your most comfortable working angle. Squeeze the trigger gently to apply the material. Thanks to the 130 kg pushing pressure, it's not hard to get the material out. When you're done, the automatic drip - stop function will prevent the material from oozing. As for maintenance, after each use, wipe the gun clean to remove any leftover material. Keep it in a dry place. If you notice any parts are worn out, replace them promptly to keep the gun working well.