Things You'll Need
Instructions
Take the battery pack out of the back of the PSP and use the screwdriver to unscrew the two small screws located underneath the battery pack. Put these to one side to make sure you don't lose them.
With the screws removed, pull the PSP screen off gently and once again place it to one side.
Use a clean cloth to wipe the area around the buttons. This will get rid of any dirt that has managed to get into the keys.
Using the same cloth, wipe around the holes where the keys pop through, once again this will get rid of any dirt that has built up.
Reattach the screen and battery pack, and get on with playing those games!