How to clean and dry a hiking hydration bladder

A hydration bladder needs the bag, hose and mouthpiece cleaned together. Drying it fully afterwards is just as useful as washing it: a damp tube tucked inside a closed pack is easy to forget.

Know the parts

• Reservoir: the flexible water bag.
• Drink tube: the hose between the bag and your mouth.
• Bite valve: the mouthpiece that opens when bitten.
• O-ring: a rubber seal, often inside a screw cap.

Wash, rinse, dry

1. Check the model instructions before taking parts apart.
2. Wash with warm water and mild dish soap, or an approved cleaner used as directed. Use suitable non-abrasive brushes.
3. Run cleaning solution through the tube and valve, then rinse every part thoroughly.
4. Prop the bag open and hang the tube with its ends open. Let caps and corners dry completely.
5. Store dry in a cool place away from direct heat and sunlight.

If it smells or leaks

Clean promptly after flavoured drinks. Persistent residue may need the maker’s cleaning product; replace parts that remain uncleanable or damaged. Do not mix cleaners or assume a reservoir is dishwasher-safe.

CamelBak identifies grit in cap threads and a twisted O-ring as common causes of cap leaks. Inspect and clean the seal, then test with clean water before putting the reservoir back in your pack.

What I would check before buying used

I would price the bag and its replaceable hose or mouthpiece together. Look inside, inspect seams and fittings, and ask for a filled leak test. If the seller cannot show that it can be cleaned properly, I would choose another one.

Related: Drinking water on NZ walks.

Sources and photo credits

Sources checked 1 October 2026.

• CamelBak: reservoir cleaning and storage
• CamelBak: care, seals and leak checks

Photo: Hydration bladder.jpg — Tiia Monto. CC BY-SA 4.0. Resized for display.