If you look at the ingredients to fall a parallels to detergents of all kinds on (surfactants). I use as an alternative either a few drops of fabric softener (if you want to smell it pretty) or take to reduce a little detergent to the surface tension, since more does not make the Venta means also. The formation of calcium deposits, it can not prevent it. I help me with vinegar, which is added to the water (is not the Burner but at least as good). The effect is even germicide. Who to chemical fragrance additives and the like is allergic should have recourse to a neutral soap. Which is odorless and also removes the surface tension, as does Spüli or whatever. I change the water weekly and operate the unit for about 2 years this way.
