DOES ROGAINE WORK AFTER 12 HOURS REDDIT

Yo dudes, so I'm thinking on using Rogaine. Heard some talk about it working after just 12 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 experiences. List a few things I'm wondering: What much Rogaine do you gotta use? Should apply it to clean hai