Re: printer cartridge
A few years ago, a local Big Lots was selling the Universal brand Black and Color refill kits at $7.00 each. Each kit would do 5-6 refils, depending on what brand cartridge was being refilled.
I bought a bunch of those kits and am still using them today.
The instructions, the tools needed to refill are pretty good. The ink is a good quality.
The cleaning solution provided is good, too.
I found I could refill the HP black cartridges about 5 times before they quit working.
The Canon black cartridges were the easiest to refill. I have one Canon that's been refilled about ten times and it keeps on running.
The HP color and Canon color cartridges were a problem after refilling. Could only get two or three refills. And occasionally, would not work after the first refill.
The best way to refill, IMO, is to do it as soon as the warning message appears or if the print starts fading. Stop the printer, pull the cartridge, refill and replace. Usually it works. I tried storing refilled cartridges, but had problems getting them to print again.
Before I started refilling, it was sometimes cheaper to buy a new printer (or the same price) than a cartridge set. Ended up with a stack of good printers.