Hey there, aspiring newbee-keeper here. I've been scouring and absorbing info like crazy before I start my first hive and came across an interesting invention by Karen Wassmer of K&W Apiary. Apparently, she's invented an entrance that has a brush attached to the top that's designed to passively sweep the mites off the bee's backs as they enter the hive. The mites fall into a sticky receiving tray where they die. Her findings can be found here, and she's selling them at her online store.
I was wondering if any of you have already tried this and had any thoughts?