We love that you only need to use water with the Ha-Ra cleaning system as a lot of the time we don't really know what is in the cleaning products that are found around the home. Unfortunately it is not a legal requirement for manufacturers of cleaning products to list the ingredients on their products.
Here is an interesting article titled "Exposure to toxic chemicals in everyday products could affect expectant mothers" from the website - The Conversation. It talks about a chemical that is found not only in cleaning products but everyday consumer products like toothpaste.
It makes for interesting reading and really makes you think twice about what products you choose.