As you are holding it in the same position as you took it out of the printer, in the uppper right hand corner there will be a small light blue / purplish tab with a triangle on it. The triangle points to another triangle on the black part of the cartridge.
Slide this blue tab back and forth several times. You have just cleaned your corona wire.
Make sure you slide the tab all the way back over to the right before putting the cartridge back into the printer.
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You need to open the front cover of the machine and remove the
cartridge( drum and toner) On the tope right there is a tab that you
need to slide from left to right about 20 times, then bring back to
I was getting the clean the corona wire problem message even after repeated cleanings. Before this problem occured the toner light was flashing warning of low toner. When I got the clean the wire pop up the toner light was on all the time indicating the toner was depleated. So, I thought I would try replacing the toner cartridge and see what happened. I opened the new toner box and noticed on the foil packege specific instructions to clean the corona wire when installing the new toner. I installed the new toner and cleaned the wire one more time. I then reinstalled the drum and toner assembly into the printer and the clean the corona wire message did not come up again. The printer now works fine.
Ok when you pull the drum out you should see a blue tab . You take that tab and slide it back and forth and this will clean the corona wire. Now when your finished make sure the tab is placed back from where you first started. I hope this helps !
I had this problem too. I took out the drum and vacuum the drum with a vacuum cleaner ( no brush ) while at the same time manually rotate the drum cyclinder. It worked. After a month or two, you might have to do it again. But everytime, it solved the dust problem.