for the people that react to the bites which is only 20% of people, they literally go crazy. i mean, they're constantly itching. they know they have bugs. they're embarrassed. you almost need some type of counseling besides termination just to get through your everyday life until the problem is gone. >> the staff uses cameras to record some of their most extreme cases. and there are many. if you think you're hearing more stories about bedbugs lately, you're right. >> you talk to anybody that's 80 years or older, they'll remember bedbugs in the united states. but they just became a cute little nursery rhyme. don't let the bedbugs bite. >> up until three years ago they were considered to be wiped out. they got rid of a product called ddt. it wiped out the bedbug population. since that was removed from use in america, bedbugs have become a huge part of everyday life. >> every apartment and high-rise