You just want to use that 50/50 solution. Go ahead and try it...I wish you hadn't thrown away that other humidifier, that way if you don't like it, you could throw it away. I am almost sure that you annot go back to distilled water after filling it with the GUNK. I may be wrong. For me, I tried it two different times....repeating the same action expecting different reults...2 x's was enough for me...u think?