Last year I had good luck catching 6 swarms with 10 traps. I made mistakes, left in trap to long, poor ventilation in trap. I have a friend, also a beek that takes them out ASAP, he caught 40 swarms with 27 traps last year. This year I am not having any luck and I have comb in every trap, last year I had no comb as I was restarting after many years with no bees. Feed them to give them a reason to stay.