Epson Stylus Photo 890 Basic Manual page 109

Do not shake an ink cartridge; this can cause leakage.
Do not dismantle the ink cartridges or try to refill them. This could damage the print
head.
Do not touch the green IC chip on the side of the cartridge. This may affect normal
operation and printing.
If you remove an ink cartridge for later use, protect the ink supply area from dirt and dust
and store it in the same environment as the printer. Note that there is a valve in the ink
supply port, making covers or plugs unnecessary, but care is needed to prevent the ink
from staining items that the cartridge touches. Do not touch the ink cartridge ink supply
port or surrounding area.
Before transporting the printer, make sure the print head is capped in the far right
position and the ink cartridges are in place. Tape the ink cartridge holder to the printer
case to make sure it remains in the proper position.
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