>> reporter: william conway, owner of this best western, says a cleaner hotel means more repeat customers. >> best western has developed a wand made by pure light t puts out a uv light. we run that uv light across the touch points in the guest room, that sanitizes those points. >> so they clean first. >> clean first. >> reporter: one this wand over. >> run the wand over, and we come back with a black light. >> reporter: uv radiation is used to sanitize in hospitals. the centers for disease control says it helps destroy germs on surfaces. at the best western, staff clean the old-fashioned way with fresh sheets, lots of scrubbing and follow up with their new high-tech tools. what do the beeps mean? >> the beeps mean it's sanitizing. every time i go over like this, you hear the beeping -- >> reporter: it's sanitizing. >> back to the alarm clock, beth cleans off the bacteria spotted with the black light. >> there's still a spot. now everything is gone. i will take my wand and sanit e sanitize. >> reporter: it's like you're a private eye. >> it looks pretty good. >> that is pretty cool. >>> a