Glad your meeting with the naturopath was good. Dust mites are a problem for my son, but his blood test showed a very high IgE reaction. I took out the rug in his room and try to wash his sheets and clean his room frequently.
I use All Free and Clear but recently bought Seventh Generation Free and Clear from Wild Oats. I don't think detergent is a real problem for my son, but everyone is different.