Iodine is a great killer of bacteria
It is a disinfectant
It will kill off mouth bacteria
Since the human mouth has more bacteria than a dogs mouth (imagine that!) it could be a great-expensive- mouth wash
I used cloth diapers well into the age of the plastic ones, and II hung them on the line to dry in the sunshine. As children get older, and diapers are older, amonia builds in the diaper.
My peditrician suggested I throw Betadine and Iodine compund in the was with the overnight diapers. Although the color was brown and a bottle was semi expensive and I used the whole bottle in the wash it did not turn the diapers brown and it worked!
It was far less expensive than buying a whole load of cloth diapers anew, especially when we were getting close to potty training