I had arm surgery in mid December and was off working ponds too much in November. One of my hives has no mites on the sticky board, it is a first year combine of several small nucs with one large one. So I am not treating it. The 3 box survivor bee wonder hive on the other hand had at least 70 mites on the sticky board that I counted on December 14th, so I had a member of bee club come help me do the lifting, get a sticky board taped in and sealed up the top well and we hit it with OAV. Because I had surgery a couple of days later and it needs a 2nd and 3rd treatment if I can fit them in, in winter, I left it taped up, and will treat again tomorrow if the temps are in the treatment range. the vapor must be applied above 4 Centigrade, or 39.2 Fahrenheit, and it is supposed to be 46 here tomorrow. I have much to do getting ready for spring, but treating for mites on my most productive hive is a good idea, and the OAV doesn't spoil the honey.