On a recent Friday afternoon I was called away from my office on an
emergency, leaving behind my thermos mostly full of coffee. When I
arrived back at my office on Monday and emptied out the thermos
bottle, I discovered that the bottom was covered in little black
squiggly marks.

I tried washing it out using a narrow brush, but the marks remain. Is
my thermos permanently stained? Or worse, was the steel pitted by the
acidic coffee? Is that possible?

Thanks.

On Jun 19, 10:29 am, " > wrote:
>
> I tried washing it out using a narrow brush, but the marks remain. Is
> my thermos permanently stained? Or worse, was the steel pitted by the
> acidic coffee? Is that possible?

I ended up using a cleaning product called "Dip-It", and it worked
great. Removed all the stains, the interior of the thermos is shiny
and bright as new!

" > wrote:

>I ended up using a cleaning product called "Dip-It", and it worked
>great. Removed all the stains, the interior of the thermos is shiny
>and bright as new!

I put a couple of teaspoons of dishwasher detergent in mine, fill it
with hot water and stir or shake to dissolve the detergent, let it set
for several hours. Clean with a bottle brush, comes out nice and
shiny.


Roger Grady
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