Unfortunately, some detergents have been found to leave a white residue, we recommend the following:
- Soaking overnight in water and white vinegar
- Soaking overnight in water and baking soda
- Allowing your cups to air dry
If these methods don’t work, we will replace your product. Check out our Returns and Lifetime Guarantee policy elsewhere on this FAQ page, and e-mail us at firstname.lastname@example.org
or call us at 866-935-4831.