The black cartridge in the first slot has been replaced 2 times but the black cartridge in the second slot is still showing three quarters full. Can I move the second cartridge to the first slot?

• When changing the black ink cartridges, the cartridge in the second slot can be moved to the first slot and a new replacement cartridge can be installed into the second slot. This may be helpful in preventing a cartridge from having to be replaced because it is outdated. Once a cartridge is open, it should be replaced after 6 months.