I love this device, I do feel good the next day. It is better to drink lots of water before using this machine, 500mls. For someone saying the rusty brown is the toxins coming out- no it isn�t, it is a chemical reaction between the metal coils and the salt. It DOES detox though just not in a visible way. The coils & salt cause an electrical reaction that helps our body detox. I have used mine in my salon with many happy patrons reporting an over all good feeling.