Use very little. You will be amazed at how much saliva is released when you whistle. Tastes are great. I prefer cinnamon, mint, ginger, in that order. As others have said, don't spit in the sink. He gets dirty. Find another method. Side note: Interestingly, I use the same technique now with toasted tahini. I'm sure it will work with any type of oil: olive, hemp, grape, etc.
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