When I did tech support for HP some 20 years ago, our advice to consumers was never to refill your toner as the photo reactive material on the drum would wear o

When I did tech support for HP some 20 years ago, our advice to consumers was never to refill your toner as the photo reactive material on the drum would wear over time. I always assumed this was true and the cartridge would last maybe 2-3x the initial amount of toner. I’m amazed that is 10 years! That’s awesome.