Once the analogue stick has been cleaned, you may wipe the connection points of the D-pad and Action Keys from the PSP to the faceplate.

Next, with the faceplate turned upside down, locate the clear/white rubber backing of the D-pad to the left of the display window.

Gently peel back and proceed to remove the directional buttons from the faceplate.

Now is the time to clean the rubber backing and D-pad with rubbing alcohol, being sure to remove as much dirt and dust as possible.