Welcome to the forum.You'll find a lot of good people here and a lot of knowledge.
What's helped me the most with SHB and mites is to place the hives in full sun. Maybe just a little late afternoon shade.
I also requeened every hive with hygienic queens, except for the swarms I caught last spring.
I went thru 12 hives last Sunday, saw and squished 2 SHB and no mites.24 hr drops on a sticky board are almost nothing, just an occasional mite.