FWIW, the reason I use a copper scraper is simply that copper, as I understand it, has antimicrobial properties, and consequently I would be able to get by with

FWIW, the reason I use a copper scraper is simply that copper, as I understand it, has antimicrobial properties, and consequently I would be able to get by with a less thorough cleaning of the scraper than something plastic or wood that's not single-use. I basically rinse it under heavy water and give it a rub with my thumb. My wife and I can both objectively report that bad breath has gone WAY down with the scraper. There's almost no morning breath now, as a matter of fact, with a scrape before bed.