Iddee, just shook them out like you do. I've never had to do it before, and if that works for you, that's all I need to know. Weather is so nice here today. Made getting out of work to go to the bee yard well worth it. Really tough to go back to work though!
As an aside, when I pulled the trap cones off the building, the plywood bases I used splintered off in layers. Obviously, the scraps I grabbed to make them where not exterior plywood. I'll make sure when I refurbish the cones to use exterior plywood or solid boards. I'm still learning.
Thanks ever so much, Steve