DOES ROGAINE WORK AFTER 12 HOURS REDDIT

Yo dudes, so I'm trying on using Rogaine. Heard some talk about it working after just a couple hours, but that seems kinda wild, right? Anyone else try this miracle drug and actually see changes in that time frame? Hit me up with your experiences. Here's a few things I'm wondering: How much Rogaine do you gotta use? Should apply it to dry hair?