When the toner in my HP Laser printer starts to show that it is coming to and end of its useful life, I can coax another 50 paper of text out of it by shaking the cartridge. Clean and effective.
I only use this in my HP Laser Printer. It never clogs and can be persuaded to yield a few extra pages, when it is getting to the end of its natural life, if it is shaken. Removing and inserting the cartridge is easy, even for me. I won't even look to see if there is an alternative cartridge available .My documents and my HP printer are both too valuable to me to risk anything else.