I recently got a scuf impact and two weeks into using it got the same issue but I managed to fix it so if you have a normal ps4 DualShock then I think you might have to open up the controller if moving the joystick up and blowing in it doesn’t work. I used the scuf thumb stick key to open the left ring and I took the thumbstick off then I literally just blew in it and put it back together but I reckon wd40 might work a bit better if you have it at home.
Hope this helps!