If you have only just noticed some stickiness or you’ve just spilled something on your controller, you only need a minor cleaning around your buttons. Grab some Q-tips and some rubbing alcohol for this quick cleaning tutorial.
# First, unplug the controller.
# Dip the Q-tip into the rubbing alcohol, dabbing off any excess.
# Rub the Q-tip around the button that is sticking several times, getting as far into the crevices as you can.
# Once you think you’ve cleaned out as much as you can, press the button a few dozen times to work the rubbing alcohol into the crevice and loosening any debris left behind.
# If the button still sticks, repeat this process or try another method lower on this list.
Rubbing alcohol evaporates quickly and you shouldn’t be using enough to do any damage to the circuitry inside the controller. Never clean a controller with water as it can get inside and cause corrosion and circuitry damage to the controller.
—
Lewis