The Gardener said:
Dr Lee! His minoxidil dries in 5-10 minutes and is much less greasy. This is achieved because his mix has a higher alcohol and lower PPG content... some people here think this reduces its effectiveness, not sure about this, but his stuff has worked for me.
Dr. Lee's dries fast and he also sells a mix with retin-a which is supposed to improve the effectiveness. It's not cheap though, and you can get the foam for about 10 bucks a can on Amazon when the price drops. And I don't think the foam takes anywhere near 20 minutes to dry, more like 5.