As regards the smell: it is an agent which is based on chlorine. Of course, you can smell that, for it acts as well as fine. Who airs a half day after the treatment, smells nothing. Although I also have to say that the smell is not so bad. Smells like the swimming pool and because no one complains, too ...
Why in the 5er Set but now only one star? Because the set of 5 comes as a set of 4! The spray bottle is missing. I am really tolerant, but one does not go in my opinion: just a part of the ordered product does not deliver. If the spray bottles are made of, you just have to change the product description !!! In the Ratings can read that it was not just me, the whole thing seems so to have system. Soak So rather from one of the other product combinations (eg set of 3).