We recommend hand-washing any stainless products to extend product lifetime. We do not recommend using chemicals on your bottle. This can ruin or rust stainless steel. Plastic lids and straws are top rack dishwasher safe. Use baking soda for cleaning: For those stubborn spots inside your stainless bottle, mix 2-3 tablespoons of baking soda with a small amount of warm water to form a scrubbing paste. Dip the bristles of your bottle brush in the paste and work paste into the affected area on the inside of your bottle. Repeat as necessary until the stain disappears. Use white distilled vinegar for cleaning: You can use household white distilled vinegar to help remove any stains or discoloration on the inside of your bottle. We recommend putting ½ cup of vinegar in your bottle, gently swirling the vinegar around to wash any affected areas and let sit for 5 minutes. Rinse thoroughly with warm water and repeat if necessary.