Hey guys, new guy here with a question...I have a friend who's into the whole "essential oils" thing...and she has tons of different flavors/scents...I was thinking Witch Hazel and maybe Tea Tree Oil...

Is this something where you can experiment with just about any essential oil, add the drops, shake, and go? Or do you think the essential oils should also be left to in a dark bottle to steep for a month or so before using?