How do you get the hot chocolate flavor out of a thermos?
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If it is a stainless steel thermos, use baking soda and hot water. Otherwise, use diluted white vinegar and let it dry out.
I would use baking soda and let it air out for a few days as well.
Wash with soap and water, and rinse well. Then fill it back up with a water and vinegar mixture and let that sit in it for about 8 hours, then rinse back out and let it air dry.
Baking soda and water, but with lemon juice will do the best job.
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