In my xbox 9. Gen controller, When moving the character forward (i.e. up) with the left...

In fact, sometimes it doesn't move at all, and it gets fixed when you shake the analog slightly. This does not happen all the time, but in some games it happens very often and does not play. I suspect dust has gotten into the analog. I can open it and check it, but I can't be sure. What do you suggest?

:)