Is it a problem to pour hot water into a Kli Sheni that still has drops of water in it from being used previously? What about pouring from a Kli Sheni into a Kli Shlishi that still has drops of liquid from being used previously?

When making a cup of coffee or tea on Shabbos, it is common to pour boiling water into a cup that was previously used for hot water or was rinsed…

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