As for bathing, many festers avoid bathing after 12 noon when fasting because they say it is makruh, ie not recommended and will reduce the rewards of the fasting since it refreshes the tired body and therefore makes the suffering less! But practically speaking, bathing every day and scrubbing with a sponge will very much help the body to detox since all the fasting is going to move toxins into the organs of elimination which are the large intestine including the liver, the kidneys, the lungs and the skin via the sweat glands and the skin cells! By removing the dead skin cells, which contain the toxin, we allow the skin to send more of the stuff it wants to remove via the skin! So one of the benefits of the fast will be a lovely clear complexion! Not to worry if in the beginning the skin throws out pimples and other eruptions, this does sometimes happen before the skin clears! But the skin will not clear unless you do not eat that foods that aggravate eruptions,like nuts and chocolates!