I have had success being treatment free since 2009 but I have used the mda splitter method. I had a local beekeeper tell me if I would split my hives with a queen cell during last of July first of August, i would not have mite losses. I have since learned that is the mdasplitters method. I want to sell queens as treatment free but I worry if my customers don't do the same the mites would kill there hives.