I have a sixties house with a traditional wood staircase. The second tread from the bottom creaks every time it's trod on. There is no access to the underside. The tread is moving in the riser on which it sits. Is there any way of stopping the noise? Is it likely that the riser would be thick enough to take a couple of screws down through the tread into the end of the riser? Kind regards to all.