Refill a toner
Couple of tips for working with toner:
Wear a mask and gloves. You do not want to breathe that. Last time I worked with toner the material safety data sheet read “Contents partially unknown.”
If you get it on you (and you will) brush off most of what you can and then wash the rest in COLD water. Hot water will make it stick.
I find the trouble to be not worth the effort.