Brush the steps clean using a brush and dustpan. If desired, wipe the area with hardwood floor cleaner and a damp rag. This prevents any dust and dirt from becoming mixed in with the baby powder.
Sprinkle a thick layer of baby powder over the squeaky portion of the step. Spread it over the seams between the hardwood using a hand broom, ensuring that most of it lodges in the crevices.
Pound the seams with a rubber mallet to help the powder settle between the wood.
Sweep up any excess powder using your broom and dust pan. Wipe the step clean using a damp rag. Avoid saturating the baby powder within the seams with water while wiping the step clean.
Repeat for each squeaking step on the staircase. To ensure that the squeaking does not start again, repeat the process monthly.