Hi , thanks for replying. I just saw yesterday that the 50% is what one should use . I want to try and find exactly that , don't want to have to measuer or mix. I spend so much time already on this problem. I know by now from reading the mites can't be totally eliminated. Depressing. Yes, my eyes are very itchy. They are active at night , so now I understand what's going on in bed at night, rubbing my itchy eyes. I haven't tried salicylic acid . I know that's common in acne treatment products; didn't know you could use that around your eyes. Something is happening with my skin since I began the sodium sulfactamide sulfer wash two weeks ago, maybe it's the "die off". Today, will look for tea tree oil locally before I order from Amazon. I've had blepharitis for years and never knew the connection to these mites. My opthalmologist never suggested anything other than warm compresses and keeping eyelids clean. . I really glad I found this Mayo Clinic discussion group. It's been so helpful. I check the daily digest daily .