I couldn't read the tiny worrying on the bottle, so I misused how to apply the first few times. Once I realized you aren't supposed to shake the bottle before using, and you put a qtip in the sediment and put on the acne it really worked! It dried out my blemishes.
I have been using the Mario Badescu Drying Lotion for years. When I get a pimple, I apply this with a Q-tip. Usually after a couple of applications it has dried the pimple & helps it to heal.