If you don’t have a plastic spudger, you can use a flathead screwdriver. Just be careful not to damage the plastic.
If you don’t have a Torx 8 screwdriver, you may be able to force it with a Philips screwdriver, but you are likely to strip the screws and make them unusable.
The bumper button covers and top cover may require a little more pull to remove than the other covers. Once the top cover has been removed, you can easily check the USB connector to see if it has a good connection.
This is a small piece, so make sure you put it some place safe where it won’t get lost.
If you are experiencing stick drift, you may be able to fix it by turning the black plastic piece on the side of the joystick module with a screwdriver. If the joystick is drifting down or backward, turn the module clockwise. If it is drifting forwards, turn it counter-clockwise. Give it a few turns and then move the stick around. Repeat two or three times to remove any gunk from the stick. [2] X Research source
To clean the circuit board, you can use compressed air to clean dust and loose debris. To spot clean the boards, you can use a cotton swab dipped in rubbing alcohol to clean the board. Just make sure you ring out any excess alcohol before applying it to the boards. To clean any stubborn dirt, debris, and gunk, you can use a rubber cleaning tool or a clean pencil eraser.
To reassemble the controller, just put the pieces back where they were in the reverse order they were removed.