Looks like spring here so I did a 1:1 solution with some essential oils in top feeders. The girls are coming home with yellow socks, I dont have a clue where from, but I guess thats a good sign. Anyhow, I pulled out, for the first time (about 2 weeks after installation) the sliding boards under the SBB. Found about 10-15 mites on each board, lots of wax dust and something like 1/8 balls light green in color. They are soft and made out of fine particles. What is that? Is it a hive product or do I have a tenant in the hives? They are in both hives in about the same amount.