I'm a little befuddled here. To my knowledge, toner cartridges do not dry out since its powdered form. My gf's old inkjet printer's ink kept drying out so I bought her a colored laser printer last year because it was on sale and it happened to be cheaper than a black & white laser. Knowing that toner cartridges don't dry out and she only prints black and white, that was fine with me. About 2 months ago she told me her magenta ran out of toner but she said she never even prints color. I told her to take it out, shake it around and put it back, didnt help. Okay..... well it can continue to print so i told her to keep using it since she dont use color anyways. Today, she told her blue is out of toner. Now i'm like WTF? Does anyone know why this could be happening? I have a black & white laser printer, and i hardly print. its been sitting around for years and my toner is not depleted.