Epson Stylus CX5800F Basic Manual page 52

7. Before you open the new ink cartridge package, shake it four or five times.
Then remove it from the package.
Caution:
Do not remove or tear the label on the cartridge;
otherwise, ink will leak.
Do not touch the green chip on the front of the cartridge.
This can damage the ink cartridge.
8. Place the new ink cartridge into the cartridge holder
and push it down until it clicks into place.
9. Replace any other cartridges that need to be replaced.
10. Close the ink cartridge cover and press it until it clicks into place.
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Maintaining Your Epson Stylus CX5800F