Had one in the house a couple of days ago. They just walk in when the door or the garage door is open. Since I do have a pest control company, the insects must cross a pesticide barrier to get in and once in, they are already coughing.....
. I just pick them up with a tissue and re-deposit them them to the great outdoors.....though the one in the kitchen many months ago ran into the sink and alas, he and the garbage disposal were united very quickly.