Have not seen or heard of the Dr Bailey products before. However, during my experience with seborrheic dermatitis I tried lots of different products. I’ve got a cupboard full of stuff that I used. There’s probably 10-15 moisturisers and +20 shampoos/cleansers/soaps. Similar to the skin peels you mentioned the most effective ones seemed to be the ones that help peel or dissolve the topmost layer of skin. My biggest problem was using them felt like I was damaging my skin.
On the contrary, the Cetaphil is very gentle. To this day I am not sure why or how it works is so well for me.
Typically I use it once a day in the evening, no more, no less. Cleansing either in the shower or just over the sink using slightly cold water (a bit colder than lukewarm). After application I rinse it off right away (without leaving it on to absorb or anything) and let the skin air dry. In about 5 minutes once the skin is almost dry, but still moist, I apply a small amount of the moisturiser and massage evenly. To give perspective on how little moisturiser I use, my first 29ml sample bottle is about 1/3 full (after about 5 months of usage). During this same time I went through two 29ml sample bottles of the cleanser (currently on my third).
After looking online I see that the products on their site have different names than the ones on my samples. Here is a picture of what my samples look like.
Reading the ingredients they seem to be identical to the Nourishing Body Wash and Replenishing Moisturizer on Cetaphils website.
My biggest gripe is that the cleanser contains a preservative by the name of methylisothiazolinone. Personally trying to stay away from any harmful and non-natural products I really wish they did not include it. This is actually one of the reasons I rinse immediately not allowing the product to absorb into the skin.
Hope that helps.