How-to refill the purell hand sanitizer?

To refill a Purell hand sanitizer dispenser, first ensure the dispenser is empty and clean. Open the refill compartment, typically located at the bottom or back of the unit, and remove any old, empty cartridges. Insert a new Purell refill cartridge, ensuring it's securely placed, and close the compartment. Finally, test the dispenser to ensure it's functioning properly before use.