Hello, I am a new member. I have been reading this forum for long time, and only decided to become a member now as I decided to start dermarolling+minoxidil. I am going to take pictures and participate to the experiment on this thread. I am going to start with Derminator as soon as I receive it (waiting to receive the shipment at the moment). I will take pics before starting so I can compareat at 3/6/12 months. Going to do it every 10 days. I have a question regarding the cartridges: how many times can be used? how exactly to clean and keep them after use?