How to Clean Bottled Water Dispenser | Step-by-Step Routine

Clean a bottled water dispenser by unplugging it, removing the bottle, draining reservoirs, washing parts, and disinfecting with a bleach solution.

Your bottled water cooler needs a proper cleaning every 1 to 3 months, otherwise algae, mold, and scale can build up in the reservoir, spigots, and drip tray. The safest approach is a simple routine that disassembles the main components, cleans them with the right solution, and rinses everything before installing a fresh bottle. The most common mistakes are skipping the unplug step and leaving residue inside the tank.

Why Cleaning Matters and How Often to Do It

In high-traffic areas, a monthly schedule makes the most sense. The routine prevents three issues: bacterial film, mineral scale from hard water, and grime on spigots. All are avoidable with a consistent 15-minute routine.

What You’ll Need Before You Start

Gather everything first. You’ll need a clean cloth (never paper towels for the interior, as they leave lint), warm soapy water, and a disinfecting solution. Either works well.

• Clean cloth or sponge (lint-free for interior surfaces)
• Warm soapy water for exterior and plastic parts
• Bleach solution (1 tsp bleach per gallon, or 1 tbsp per 4.5 L)
• Vinegar (optional, 1 part to 3 parts water to remove scale before bleaching)
• Fresh bottle of water to reinstall after cleaning

The Complete Cleaning Process, Step by Step

This sequence works for most bottled water coolers. Check your owner’s manual first, since some models, like the 500 Series and 300e Series, prohibit bleach entirely.

1. Unplug the unit. Turn off hot-water switches and wait about 1 hour for the hot tank to cool before servicing. This prevents burns.
2. Remove the empty bottle. Lift it straight off the receptacle and set it aside for recycling.
3. Drain remaining water. Open the spigots or drain cap, depending on your model. Drain both hot and cold paths if present.
4. Clean the reservoir. Wipe the inside with your bleach solution using a clean cloth. Let it stand for 2 to 5 minutes—Health Canada warns against longer due to corrosion risk. For hard-water scale, apply a 1:3 vinegar-to-water mix first, then rinse.
5. Disinfect the spigots and levers. Dip a cloth in the bleach solution and wipe every faucet and lever, especially the underside where drips accumulate.
6. Rinse thoroughly. Run clean water through the reservoir and out the taps until all bleach residue is gone. This is non-negotiable—bleach left behind will ruin the taste of your next bottle.
7. Clean the drip tray and screen. Remove the tray and any spill-proof insert. Wash in warm soapy water or on the top dishwasher rack if the manual allows.
8. Dry and reassemble. Dry every part, replace the drip tray and insert, install a fresh bottle, and only then plug the unit back in.

If you’re in the market for a new unit, our roundup of the best bottled water dispensers compares models that are easier to clean and maintain.

Some manufacturer manuals, like those for the 100 Series, 300e Series, and 500 Series, explicitly instruct using only warm soapy water on the exterior, bottle receptacle, tank, and faucets, and say no bleach or abrasive cleaners. The 500 Series also requires removing the drip tray assembly and draining the hot tank via a drain cap with a red silicone plug before drying all parts. When your manual conflicts with general guidance, the manual wins—bleach on a model that forbids it can damage seals and leave chemical residue. This approach protects internal components while ensuring the water stays safe to drink.