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Prize_Emergency_5074 t1_j8u74ie wrote on February 16, 2023 at 11:44 PM

Reply to comment by 99available in Cleaning a thermos bottom from coffee traces "properly". by iBo0m

90% isopropyl and sea salt, voila!

99available t1_j8uelq6 wrote on February 17, 2023 at 12:38 AM

Thanks.