Before you clean your water cooler, you will need to make a cleaning (disinfecting) solution. Whenever you make or use the solution, protect yourself by wearing:
safety glasses with side shields
disposable gloves
a waterproof apron, smock, or overalls
To make the disinfecting solution, mix together:
15 mL of five percent, unscented bleach
5 liters of clean, warm water
If you use a chemical product to clean, descale, or disinfect your water cooler make sure it is:
approved to use on food contact surfaces
used at the right concentration with enough retention time (follow manufacturer’s instructions)
stored properly
flushed out after cleaning (with water suitable to drink)