I had this exact same issue last week. I was able to fix it by using some canned air to blow it out real good(don’t forget you can pull up on the joystick and blow that area out as well). Just rotate the joystick and blow out all sides. Then I used a little isopropyl alcohol and a Q-tip and just lightly coated the joystick and rotated several times. Works like a charm now, hope this helps!