Here's a recipe for "Moose Juice" by a fella called Stumpy which is basically the same thing.

3 oz. Castor Oil
1 oz. Murphy's Oil Soap
4 oz. Witch Hazel
8 oz. 91% Isopropyl Alcohol
16 oz. Distilled Water

Mix all ingredients well, dip or soak patches in the "juice" then spread them out on wax paper and leave them until they become semi-dry. You can also keep some of the liquid in a small squirt bottle and moisten the patches as you shoot if you prefer.

I believe Cayugad has a concoction that he prefers that may be simpler to make.

BPS