Dreaded Drift

Basically, stick drift is when your controller seems to work on its own. If you notice your in-game character keeps looking around by themselves, or if your gun keeps shooting without you ever pressing the trigger—your controller has almost definitely developed drift.    Playing with a drifty controller can be incredibly annoying at best and in the case of fast-paced shooters, detrimental to your performance.

What causes a controller to drift?  

The overall build quality of controllers vary from brand to brand. Some are much more prone to developing drift in a shorter timeframe than others.   The main natural cause for controller drift is dust and other debris. Things like food particles, pet fur, and dead skin can accumulate inside your controller and cause it to drift.

The other reason your controller might start developing drift is natural wear and tear. 

Face Buttons

Bumper Switches