ROGAINE AFTER 12 HOURS REDDIT - DOES IT WORK?

Yo dudes, so I'm hopping on using Rogaine. Heard some stuff about it making a difference after just 12 hours, but that seems kinda wild, right? Anyone else try this magic potion and actually see results in that time frame? Hit me up with your thoughts. Here's a few things I'm curious: What much Rogaine do you gotta use? Should apply it to clean