Epson Stylus CX6600 Operation Manual page 49

Warning:
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Be careful when you handle the used ink cartridges. There may be
some ink around the ink supply port. If ink gets on your skin, wash
the area thoroughly with soap and water. If ink gets into your eyes,
flush them immediately with water. If discomfort or vision problems
remain after a thorough flushing, see a doctor immediately.
Caution:
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Leave the used ink cartridge installed until just before replacement;
otherwise, ink remaining in the print head nozzles may dry out.
7. Install the new ink cartridge straight into the cartridge holder, and
then press the top of the cartridge until it clicks into place.
If you need to replace the other ink cartridge, repeat steps 6 and 7.
8. Close the cartridge cover.
Note:
If you find it difficult to close the cartridge cover, see step 7 to make sure
the ink cartridge has been installed correctly.
Replacing Ink Cartridges
49