Why are my prints coming out double/blurred lettering and image

"A good place to start is to print a print quality test page or self test report. The print should show the colors in either bars or typing, the colors should be clear and sharply defined. One or more colors may be printing offset compared to the other colors and that offset can make the image look blurry or even a double print.

HP has a tool that you can download, found on this page (https://support.hp.com/us-en/product/hp-...). This tool is supposed to fix scanning and other problems.

If the tool does not fix the problem, remove the toner cartridges and drums and inspect the laser aperture for dust. Use a clean lint free cloth to remove dust, do not use canned air as that will just blow dust to places hard to clean. A laser vacuum or finely filtered vacuum can be used, house hold vacuum cleaners are not suitable because it will suck up the toner and blow it out the exhaust."

"Hey everyone!!

The same thing just happened to me and of course I panic because I am working on a project due in the mail tomorrow. It was definitely the black because I placed an old black cartridge. So I shook up the original new black that was in the machine and it WORK!!!!! Thank You Lord…."

I used to use HP toner toner however I had switched to a generic branch I found online. (Much cheaper) 1st few worked no problem and they a got a batch of bad one that was causing this problem. I switched back to HP genuine toner and never had an issue since.