I have washed immediately after receipt of the Duo-Caps a wash load and am thrilled !!! For years I used Ariel, but have a new fragrance that I am no longer zusagte.So me Persil gestoßen.Zuerst powder and then just the duo Caps.Habe time being times uses only one cap since my clothes not so much dirty ist.Weichspüler I also weggelassen.Meine laundry smelling super fresh !!! I am very pleased. :-)