I have one son with eczema so I have always bought the "free" kind of detergents, usually tide.
DH, the coupon king of America, bought the Arm & Hammer kind (probably free) and now younger son broke out everywhere his freshly laundered shirt touched.
so, what works for you?
I'm afraid maybe the products have changed. we don't use fabric softener or dryer sheets either--just dryer balls.