Prolonged cycles of contracting in dry winters and expanding in humid summers may cause squeaks in your hardwood floor. Air conditioning in summer and humidifying in winter will prevent extreme cycles. But squeaks are easily repaired.
1) Wax
To silence a squeak, try applying liquid wax.
2) Powdered Soap
Pour some powdered soap between the floor boards that are squeaking.
3) Talcum Powder
Talcum powder or powdered graphite are also great in reducing the squeaky friction.
4) Nailed it
If all else fails, drive two-inch finishing nails through pilot holes near both edges of the board, then hide the hole with matching color putty or wax.
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