I have a tribal tattoo on my right upper arm that is 12 years old, I have had 13 Picosure treatments on it over 3 years and the last 3 treatments have seen very little effect, I have had the clinic in the UK contact Picosure to have them advise on the settings and the last treatment had a small amount of success as seen in the photos, before I would see large areas fading. Should I carry on with Picosure and what advise can you give me please?