# My bottle is rusting, how should I clean it?

> Our flasks are manufactured from 100 Food Grade 188 Stainless Steel Stainless Steel can rust if it encounters acids bleach based solvents or the dishwasher

Source: https://faq.hydroflask.com/en_us/my-bottle-is-rusting-how-should-i-clean-it-r1rEJLZm3

Last updated: 2023-04-22T12:19:45.647Z

Our flasks are manufactured from 100% Food Grade 18/8 Stainless Steel. Stainless Steel can rust if it encounters acids, bleach based solvents or the dishwasher. It can also accumulate mineral deposits from coming into contact with local tap water or metals that appear as rust spotting. To determine if you’re experiencing mineral deposits or rust, we have a quick, all natural trick that may remedy the issue:

1\. Mix 2-3 Tablespoons baking soda with a small amount of warm water to form a paste. The paste is a nonabrasive scrub and deodorizer.

2\.  Whip out your handy Bottle Brush! Dip the bristles into your baking soda paste and apply to the affected area.

3\. For extra tough spots, add a splash of white distilled vinegar to the baking soda paste and continue to work into affected areas.

4\.  If any debris remains, reapply your Bottle Brush.

5\.  Rinse the flask with warm water. Then wash with regular dish detergent.

6\.  Always ensure all portions of the flask are thoroughly dried before storing and/or store with the cap ajar.

It may be necessary to repeat this process to completely remove deposits. If you're unable to achieve satisfactory results, we will be happy to replace your flask. Please file a warranty claim here: [Warranty Form](https://hydroflask.kustomer.support/contact/hyf-warranty-form-SJNQREn85)