Nothing ever worked
Actually I go way back as a Minoxidil user, I started using Minoxidil when a pharmacist actually took the pills and mixed them with alcohol then bought the end product, Rogaine 2% with a prescription for several years. Tried Dr Lee's 15% Xandrox formula for a couple years, and then the Dr Procter line for a few years. I can say that nothing worked for me, in my case I think the follicles are dead. In the late 1970's when I first started using various products I was a Norwood 3, today I am a 4.5, thin top and crown, receeding hairline. I will use the last of my Proscar and not replenish the inventory. Note I also took several lines of vitamins and antioxidents over the years, again nothing worked.
The Minoxidil product line did absolutely nothing to my scalp, no irratation, or problems, no hair growth either.