DOES ROGAINE WORK AFTER 12 HOURS REDDIT

Yo dudes, so I'm hopping on using Rogaine. Heard some stuff about it helping after just a couple hours, but that seems kinda sketchy, right? Anyone else try this magic potion and actually see something in that time frame? Hit me up with your stories. List a few things I'm curious: How much Rogaine do you gotta use? Should apply it to dry hair?