iBo0m OP t1_j8tik9j wrote on February 16, 2023 at 9:05 PM

Reply to comment by ladz in Cleaning a thermos bottom from coffee traces "properly". by iBo0m

Thanks, but I think this is similar to what I have tried and replied here to u/Old-Ranger1405 . The tablets from Sigg have good reviews, I used them repeatedly and no luck (I mean half of the bottom went off).

Old-Ranger1405 t1_j8tkaee wrote on February 16, 2023 at 9:16 PM

I just use the ones from the denture isle at the pharmacy. Sometimes several, and hot water helps too. Good luck!

green19frog t1_j8uj4sw wrote on February 17, 2023 at 1:11 AM

I agree with the hot water. Like really hot water. I have had luck with baking soda and hot water before when letting it sit for hours.

ladz t1_j8u192r wrote on February 16, 2023 at 11:04 PM

Dunno how similar a sigg tablet is. I use puro caff or or puly caff espresso cleaner for bottles, airpots, brewers, espresso group heads, portafilters, etc. It always works awesome and everything ends up looking like new.

Free2718 t1_j8v945d wrote on February 17, 2023 at 4:42 AM

This is maybe a more cheap redneck engineering approach - beefiest steel wool/metal dish scrubber, bar keepers friend and back end of a wooden spoon?

Seems like the grit combo of the above could be helpful since it looks caked on.

Maybe follow up with the coffee or denture clear the rest of the folks offered as advice