Clean the joystick with compressed air
Use isopropyl alcohol on a cotton swab around the stick base
Move the stick in circles while cleaning
Update the controller firmware
Recalibrate the controller in system settings
Increase the dead zone in game settings
Reset the controller
Replace worn analog stick modules
Check for dust, dirt, or debris inside the controller
Avoid pressing the stick too hard
Store the controller in a clean, dry place
Use a controller repair service if needed