How do you deep clean a metal water bottle? Posted on September 22, 2022 By admin 1. Stir a little (one tablespoon) bicarbonate soda (baking soda) with white vinegar (1 – 2 tablespoons) to concoct a paste. 2. Chuck it inside your bottle and let it sit for 10 minutes (if you have the time) then rinse it out with boiling water.