Question: I have been using Minoxidil 4% for nearly 9 months. However it causes a white powder like residue on my scalp. How can I control this?
Answer: Like you, I use Minoxidil (5% + MPG). I also sometimes get this just in front of my hair-line (where it has dripped). Once it has dried up it is ok to wipe off because all the required Minoxidil has been absorbed info the scalp. It is very easy to be wiped off and can be done with your finger.