I need to know what detergent to try for my son who seems to have developed an allergy to something. I currently use tide, sears, era and whisk so not sure what to try for him. I tried tide free and clear but not sure if he noticed a difference. He is currently seeing a dermatologist and going through some testing. It seems to lcalize in a very tender spot and it's not the obvious male prob, they have treated him for that already. Feel bad for him.