I have been attempting to kill the parasites (most likely, mites) on my skin for two months, now. I know that isn't very long in mite-killing time, but it feels like its been an eternity, especially since I've had this ongoing Acne for he last eight months (since I quit smoking).
Try using a product called "Nucelle". It's finally what is working for me. It seemed like the cold cream and other stuff was killing the mites, but they would die inside of my skin, which wasn't good because that's when those horrible, painful, never-ending pimples and chicken skin (or whatever they are) would crop up. I really believe that Nucelle is driving the mites out of my face. I can literally see them come out of my skin after I put the Nucelle on. And that is the honest truth. They say you can't see them, but you can definitely see the ones I have.
I've only been using this stuff for six days, but I can tell you already that my stubborn neck Acne (which I've had since the beginning of this mite-killing battle) is finally going away. Also, I had used a mandelic product before (two years ago) and it cleared up my Acne completely. I don't know why I stopped using it. Just got lazy and didn't need it, I guess. But then I quit smoking and all hell broke loose on my face.
Anyway, there's nothing online about mandelic acid killing demodex, but I did find some articles about them using it in bee hives to control hive mites. (Mandelic Acid is derived from bitter almonds.) So who knows. All I know is my skin is responding to it, and it's killing those things by driving them out instead of rotting in my face.
I also know that leggybrandi made her own cold cream and that (I think) has finally cleared her up. I made my own cold cream with Colloidal Silver and regular borax. I think it worked, but it worked too well. I got a gigantic cyst behind my jaw bone--kind of on my neck. It was horrible. I don't want those blasted things to be dying in my skin. I want to drive them out.