I noticed a noise coming from my steering stem when I apply front brake and push the bike forward and backward. It sounds like an old door, creeking. So I have tightened the two locking nuts beneath the steering mount and sprayed lube into the bearing then tightened the top steering nut, but noises persist. I have searched this problem in the previous threads, but did not find similar problem. Maybe my search query was inaccurate, IDK.