or you can just make it yourself... if 30% is active ingredients thats 30ml/300ml in a 100ml/1000ml bottle. then you have 70% left of inactive so you know atleast 60%+ (60ml/600ml) is water leaving you ~10%(10ml/100ml) use that to add the soap (3.5ml/35ml), alcohol(3.5ml/35ml), citric acid (pinch or three - yes its in the new formula and should be listed as active ingredient but meh), sodium chloride(table salt)(pinch or three), and magnesium sulfate (epsom salts)(pinch or three) but yea. save yourself some money and dont fall for bottle hype
make sure to get organic oil. btw i use 30% organic veggie/cooking oil also and works just fine doesnt have to be corn/soybean but im not stopping you :D
i also use 120proof-190proof(everclear) isopropyl is super toxic for you and anything it reaches. DEM (dragonfly earth medicine) touches on this. there is no difference in effect from one booze to the other.