You wouldn't imagine that something as apparently harmless as a water dispenser could get dirty... but it could. In reality, a water dispenser has to be cleaned and even sanitized regularly. (After all, microbes love moisture, and there is loads of that in your water cooler.)
Find out the appropriate way to clean a water dispenser -- indoors and out -- and then see what you will have to do to sanitize it.
Note: Always consider the manufacturer's care directions before cleaning. Not all water coolers have the same body, and you don't want to break or damage yours.
How to Clean Water Dispenser

When it is about finding the most reliable way to clean a water cooler, you need to wait until the water container is empty. Believe this will make your job so much easier, as you won't have to carry heavy bottles of water or bother about liquid sloshing all over the place.
You will need:
Steps:
Tips For Cleaning A Water Cooler on the outside (Such As The Taps)
The exterior of your water dispenser wants some love! Think of all of the hands that touch it and what may be happening inside those taps. This is a rather easy task.
You will need:
Steps
How to Sanitize Your Water Cooler

Most manufacturers suggest that you sanitize your water cooler every three to six months. Although, you'll need to check your maintenance instructions to be sure you don't need to be undertaking this task more or less often.
Additionally, sanitizing a water cooler can be challenging and doing it in a wrong way could result in your water tasting odd or being toxic to your health if sanitizer resides in it for too long.
Many people often sanitize their water coolers using bleach. Remember that if your water cooler cleaned with vinegar, this isn't a smart move.
Bleach and vinegar are two cleaners that should never be mixed, as they produce toxic chlorine gas when mixed.
It is always a good idea to follow the sanitization guidelines provided in your manufacturer's manual or ask your water service provider if they offer sanitization services.