I built an acoustic LEVITATOR! Making liquid float on air

@Physics Girl 
Hello, I am trying to build an acoustic levitator for a school science fair project. I plan to dissolve pharmaceuticals (most likely Ibuprofen) in warm/hot ethanol and levitate droplets of it over the levitator; the ethanol will (hopefully) evaporate and the pharmaceuticals will be in amorphous form. However, I am trying to levitate water at the moment, and I am not able to levitate liquids. I am using a syringe with a needle. (I got my levitator kit from Makerfabs https://www.makerfabs.com/acoustic-levitator.html)... What would you recommend doing?