I am not sure about a recipe, but I would imagine that a combination of aloe, colloidal or ionic silver and perhaps a drop or two of oil of oregano or tea tree oil would be a good one.

Personally, I use the unique colloidal silver skin and scalp bar from CZ sponsor Utopia Silver.  It contains colloidal silver, aloe, plant minerals, juniper oil and more.  With the CZ discount code (LR001) you can get a 4.5 ounce bar for a little over $5.  I personally use it (and the colloidal gold bar too) and have had no need for hand sanitizer, bath soap or shampoo ever since beginning to use it.  You can also use it as a toothpaste and it gets rid of gum disease and plaque.