Thank you for your reply! So you are saying that your SD has not completely cleared after several months of use?
I have been using Tom's shampoo and lotion for 5 weeks now to try and beat down a Malassezia folliculitis take-over of 50% of my body. I did have a small patch of SD on the backs of my ears when I started (was first time to get SD in that area - have previously battled it on my scalp but been clear there for many years now), and by the 2nd or 3rd week of use, the ears were healed. BUT, I also put the lotion on that area, which I feel (just a hunch) is more effective than the shampoo, due to the fact that it stays on for a longer period of time. I also think that the lotion repaired barrier damage in that area (whereas I find the shampoo a bit drying on my skin other than scalp skin). Again, just a theory. Anyway, you might want to try the lotion, as well!