How do you do the invisible water trick?

Does anyone know how to do the invisible water trick. I saw it demonstrated at a science fair. This guy put pepper in a bowl of water and when people put their finger in the bowl nothing happened but when he put his finger in the pepper was repelled to away from it.

Answer #1

wow … it’s been a v-e-r-y long time since i did this. I don’t exactly remember, but for some reason, it seems like it may have been something like dishsoap.

might as well try it. let me know if you find out. :-)

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