Anytime they have a traffic jam it's probably a good idea to open it up more...
Wouldn't it be amazing if colonies died less with a smaller entrance closer in size to nature?
I read a study that showed mites breed slightly less in high humidity.If you've ever had those "wild" bees that like to propolize a lot you'll see them adjust the entrance over the course of the year. Wider in a flow. Narrower when it's not a flow. Unfortunately, we bred that out of them..