i forgot to mention that if i had your situation, i would definately increase the strength of the mms solution according to how much parts of water i was going to add. for example--- if iwas going to do a foot bath and lets say there would be 10 cups of water in that foot bath then i would multiply what i did for my daughter 15mms and 75 citric acid times(x)10. atleast that is how i would do it if i were having a footbath.
either that or(if you dont want to waste that much mms) just make up a solution like i did for my daughter and just rub (or dab it on with a cotton ball) it on the areas and let it dry.
but remember--- this is just what i would do.
the solution cant be too diluted--- but somewhat dilluted-- ya know what i mean? if it looses too much of the yellow color then it is too dilluted.