Card Reader Removal
In order to remove the card reader you will have to remove the screen and the entire top cover in order to access the screws.
There are three screws that you will need to remove. Two are towards the front on the left and right tabs that bold the card reader to the aluminum chassy. the third is in the center at the back of the card reader and bolts to a standoff.
Once you remove them, you can slide the cardreader back, up, then out.
I just finished cleaning my cardreader and if you look at the pictures, you can see the tab on the left and right where the screw holes are. you can also see the rear center hole.
Sorry I don't have pictures when I took it apart. Good Luck!