Step 1: Bleach & Water
Add a couple of drops of bleach to water (2-5 drops per liter of water), and it’s okay to do this with the water already in your bladder. Make sure to use bleach that is fragrance-free and does not include any dyes. You may then seal up the bladder, swirl the solution around, and run it through the drink tube and bite valve. Now leave your hydration system to sit overnight.
Step 2: Rinse & Dry
The next day, empty the bladder. After emptying the solution, rinse the entire system with warm water three times. You can now leave the system to dry.