Troubleshoot and Reload Grease Gun

What happens here

The presenter encounters a problem with his grease gun, as the grease has liquefied due to heat and is not dispensing properly. He demonstrates the proper way to replace a grease cartridge without creating a mess: remove the cylinder, remove the old cartridge, insert a new Lucas Red 'N' Tacky grease cartridge, and reassemble the grease gun. He wears orange rubber gloves for this task to keep his hands clean.

Goal: Repair a malfunctioning grease gun and reload it with a new cartridge.