Using a grease gun effectively ensures proper lubrication and maintenance. To begin, load the grease gun with a cartridge or bulk grease, then prime it by pumping until grease flows smoothly. Attach the grease gun to the fitting or zerk, ensuring a secure connection. Pump the handle to dispense grease, and watch for excess to avoid over-lubrication. Once done, release pressure and carefully detach the gun. Regularly clean and check the grease gun for optimal performance. For a comprehensive guide, see the instructions on how to use a grease gun to ensure proper technique and maintenance.