Remove the upper tray from the Scentsy warmer by lifting it out of place. Set the tray aside.
Install the warming bulb, turning it clockwise until it is tight. Replace the top tray on the warmer.
Break one or two squares of the scent of your choice from the block. Place the squares in the warmer tray.
Plug the power cord into a wall outlet. The bulb will emit heat that melts the scent blocks.