A man who skipped out on a lodging bill was later caught thanks to a common item he left behind in his hotel room.

Stephen Evans left a Welsh seaside resort in Llandudno after two nights without paying, according to news.com.au.

But Evans left his toothbrush.

Police discovered the mouth cleaning instrument in the vacant hotel room, and after having it forensically checked—in CSI fashion—found a match in their database to Evans, news.com.au reports.

Prosecutors said Evans had been kicked out of his home and had no place to stay. So he checked into the hotel using a false name.

Evans, 29, who is a plasterer in Llandudno, admitted to the charge of leaving the hotel without settling up the bill. He was ordered to pay $102 for the two nights he had stayed there, and $95 in costs. He was also placed under a four-month curfew, during which he is not allowed to go out from 8 p.m. to 8 a.m. each day.

The incident may now give Evans something more to think about every time he brushes his teeth.