My husband had something similar several years ago and a friend's husband had it recurring. Dermatologists told both that it was a "skin disorder--probably fungal". Does your husband wear athletic socks (white) that you are bleaching? It is interesting that they told him to put his feet in bleach water because the dermatologist told both of them NOT to come in contact with bleach and to "double rinse" their socks with a cup of vinegar added to the second rinse. This helped tremendously. Also, use some plain powders (like Gold Bond) in your shoes, but you also have to be careful about wearing the same shoes all the time, especially if your feet sweat. He also needs to not walk around without socks at home. My husband would wake me up at night scratching his feet because they itched so bad. Hope this helps some. Good luck.