I have used Manic Panic for a couple months now and I keep coming up with reviews saying that the hair color doesn't last. I have a couple tips because honestly, I have been very satisfied with Manic Panic. I pre lightened my hair because it was very dark, I then added the dye. This makes for a more vibrant color. I leave it in my hair for 2-3 hours and add heat (blowdryer). I used to be afraid to shampoo my hair because all the color would come out but then I bought shampoo/conditioner especially for color treated hair. I found that to be verrry effective. SO there you go, those are my tips on keeping the dye in. It lasts me a couple weeks before I decide I need to dye again (:
(Emailed Review from Marble)