we have used this style of trap at are church and have never been sprayed yet. there is one product that does work real well. you can get it from your vet. it is called SKUNK-OFF. comes in a small white bottle. when our dogs take a spray you wet them down with this stuff and let it sit about five minutes then towel dry. if you can smell the skunk after this you have just missed a spot. repeat the process and it works real well. i have used tomato juice, vinegar and all the old cures but never had any luck. try the skunk off you will be surprized.