It’s the kind of thing you forget about until you’re going up the stairs and there it is: the squeaky step. Though probably not on the top of your to-do list, this quick reference may give you the motivation you need. It may be as easy as dusting the stairs with a little talcum powder.
Here you’ll also find extra tips in case the powder doesn’t work. There are some how-to’s from beneath the staircase, and if you can’t get under there, also from stair level.