When it got bad, they would poke their heads through the vent holes which was disgusting. Then I was so afraid they would chew their way out I covered them with pieces of duct tape.
They are cruel because they slowly die in those things. I used to make rounds with soapy water. If I have to kill, I try to do it quickly. I have gotten so I will pinch them with my fingers or knock them off and stomp on them. Then I have to wash my hands well.
I am hoping in time they will develop something safe that doesn't have unintended consequences to eradicate them. I don't think they've hit the CA grapes and fruit and almond trees. You can bet if they get too pesky on the west coast, they will be very aggressive about finding an effective way to get rid of them.
There have been some experiments, won't go into it. Whatever you do, don't use anything with the neocontinoids in them like I did one summer, fortunately I saw right away what happened. They are now high on the list to blame for the loss of honeybees.
Hubby takes care of the traps for me. I don’t like to put any kind of chemicals on my stuff because I like the bees to live, and I don’t like to ingest pesticides.