I have not. Nor has my mentor of 30 years lost any due to mites.
I have seen a buildup actually of my colony since we went into winter.
I would check out Little Creek the ranch. Ken teaches classes on a number of things one of which is an all day class in a classroom using essential oils. I drove 8 hours to take this class as well as several others from him over a period of 3 months. I cannot tell you how much I learned and now understand more about the Honeybee and beekeeping.
I am not the longest distance traveler to his class. He’s had a few that have flown into town rented a car in Tulsa and then drive another hour and a half to him. Well worth the money and time
Also look at what Michael as said. He’s not treated I wonder what he’s using 
?