It still smells like rum because that's what it is
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Leaving the jars in hot water does not change the properties of the alcohol like cooking with it does. An eyedropper is usually 1mL I believe. I would just start with 1/2 teaspoon, wait 2 hours, then take another 1/2 teaspoon and see where that takes you. Dosing too much at once is not pleasant
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