ROGAINE AFTER 12 HOURS REDDIT - DOES IT WORK?

Yo dudes, so I'm hopping on using Rogaine. Heard some stuff about it working after just 12 hours, but that seems kinda crazy, right? Anyone else try this hair growth serum and actually see results in that time frame? Hit me up with your thoughts. List a few things I'm wondering: How much Rogaine do you gotta use? Should apply it to dry hair? An