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cleaning thermos

I have a stainless steel Nissan thermos and also just bought a lovely Technivorm coffee maker that comes with a stainless steel thermos. Neither has an opening big enough for me to get my hand into to clean. So my question is....

how does one clean a stainless steel thermos? In particular I'm concerned about the residual build up of old coffee that will adversely affect the flavor of freshly brewed coffee.

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  1. get a long-handled scrub brush - i bought one specifically to clean the green tea stains out of my stainless travel mug.

    1. A bottle brush is your friend. With a little bit of hot soapy water it should take care of most problems.

      If you get an accumulation of crud that the bottle brush won't remove, try dumping in a tablespoon or two of uncooked rice, a fair amount of dish soap, and a little hot water. Put the lid on and shake hard until your arm muscles give out. The rice will abrade off most anything.

      1. I use hot water, a bottle brush. If the buildup is bad, dissolve a few Tbls of baking soda and let stand for a few minutes and then scrub as usual.

        1. I think soaking with Polident will loosen things up.

          1. Urnex 'Cafiza' is the best coffee stain/residue cleaning product that I have ever encountered.

            It is actually the same product recommended for blind cleaning of manual espresso machines and can be obtained from any internet site that specializes in such equipment. I originally bought it for use in our two year old Vibiemme and it keeps all parts clean and fresh from any old coffee oils; but have since found it has amazing cleaning abilities.

            After decades of use, our stainless steel lined thermos' which transport coffee on every family road trip, had taken on a dark brown tint that no amount of swishing with detergent or even abrasive cleaners like comet could dislodge. I tried the Urnex product and after two overnight soakings, the interior is like brand new and coffee tastes better as well.

            Since that discovery, I use it once a week or so to soak out our stainless steel bottom Bunn coffee pots at the office which literally bakes on a daily basis and the stuff works magnificently. No scrubbing needed. Just pour in a tablespoon, add hot water, swirl to dissolve and let it soak overnight. Rinse well, until the water stops being soapy, do a final hot water rinse and it's amazingly clean.

            I tried the same product on a very well stained Riedel decanter that has been used for decanting vintage port for nearly a decade and had a decidedly red film that no amount of scrubbing (rice, soft brushes, etc.) could dislodge. Within minutes of soaking and swirling, the crystal was crystal clear again.

            Expensive at $12. per container, but at a tablespoon per use (espresso machine only requires a teaspoon), my original 16 oz container is still half full after a year or so. Sorry I couldn't make the following into a direct link but go out to the 1st line coffee website and look for the cleaning products. It really works


            1 Reply
            1. re: ThanksVille

              Thanks, that stuff sounds great. Next task is to find it here in the UK. What does it taste like?

            2. Thanks to everyone who responded. The brush sounds like a great idea and now I just might have to try Urnex!

              1. When no brush is available, just add a few drops of dishwashing liquid (e.g., Dawn), fill with very hot water, screw on lid & shake, and then empty & rinse several times until the water runs clear.

                1. I agree with the following, get a thin tubular brush, let the thing sit with hot water and soap for a few minutes, then brush it out. There's really no other way unless you mix up some ungodly concoction of cleaners which, I wouldn't do as you might distress the stainless steel inside causing corosion....I clean things for a living..check me out....www.collegestudentcleaning.com

                  1. Powdered dishwasher detergent and hot water. Let it sit awhile, then shake it well and uae a brush. Rinse multiple times. A co-worker tipped me to this - works like a charm, way better than detergents meant for in-sink dishwashing.

                    1. Denture cleaning tablets does a great job of cleaning bottles.