Rick Steinow shows how to detect bedbugs using tape. Rick shows that obvious signs would be fecal matter and blood stains. If you're still unable to detect bed bugs, you can purchase a roll of double-sided carpet tape. You're also going to need a roll of painters tape. Apply a strip of the double-sided tape all the way around the mattress. Place another strip of tape around the head board. Make sure to add a strip of painters tape first when doing the headboard. You'll do this because the double-sided tape could ruin the headboard. The next morning check to see if you've captured any insects. make sure to use a magnifying glass. Fast, easy and inexpensive, an easy way to check for bedbugs.