Moldy Odor In a Thermos

Try a heavy mixture of boiling water and 1/4 cup dishwasher soap and let it soak overnight, then rinse thoroughly the next day, until all smell of the soap &/Or mold is gone. This may take a few times to completely clean it out.

Kim, from Canada; I use baking soda and water,to get odors out of my thermos, it works everytime. Let it sit, for a while.

Try dissolving a denture cleaning tablet in the thermos with very hot water and let it sit for a while, overnight if possible. Then rinse, and the moldy odor will probably be gone. I use cheap denture cleaning tablets from the dollar stores for a variety of cleaning and deodorizing jobs. They are great for getting hard water stains out of flower vases and other glassware, too.

Tori from Pittsburgh, PA

Try filling the thermos with plain white vinegar and let it set overnight. Then empty it out in the morning and rinse well.

Thanks for the tips. I'll give them a try and will let you know what works.

What is the best way to remove coffee stains from my thermos?