I know that it is important to have the right instructions for replacing parts. These instructions however, are located in your owner's manual on pages 12 and 13. If you do not have a copy of it, just link on this link to download on:
Tip: If you are having problems with the eject button; take a wooden spoon and use the handle to push the button in until you see the filter pop out. It may take some force depending on how stuck it is.
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