Remove the water bottle from the unit and pour out any remaining water. Fill the cooler with warm water and bleach, using about 1 tsp. bleach per 1 gallon of warm water used.
Place your hand over the lip of the bottle and shake. Place the bottle onto your cooler unit and run the water out through the taps to clean the reservoir and taps as well.
Fill the container with about 1 gallon warm water and run through the cooler unit to flush out any bleach residue.
Rinse the container with warm water to remove any bleach residue and sit aside.
Drizzle about 1/2 tsp. dish soap onto a cleaning rag, wet the rag with warm water and wring out.
Wipe the rag over the exterior of your water cooler unit as well as the lip of the bottle.
Wipe a damp rag over the exterior and lip of the bottle again, this time using water only to remove any leftover soap residue.