Yes, of the many things I have tried, "products" (and most likely obsessive picking/licking) made my condition much worse. Natural treatments have not worsened my condition, and may have helped improve it (along with diet and lower stress -- or plain old time, who knows, really?) So I am staying with natural solutions for the foreseeable future.
You should talk with the user named ahr, he has eliminated preservatives in all forms and is on a restrictive diet, and holds a similar theory. I did not eliminate sodium benzoate from my shampoo, just everything I ingest.