Extend the lifetime of Brother MFC ink cartridges

To let your printer think the ink level is still sufficient for its services, you can trick the “light sensor” with black electrician’s tape on the ink cartridge:

Mask the supposedly empty ink tank with black tape to trick the tiny round ink level sensor.

Done, the error message should fade away and you’re able to use the printer again.

Note: In my case there was still quite some ink the cartridge to allow “ok” prints. You should replace the empty cartridge soon to prevent a clogged print head, though.  

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