What to do with Squeaky/Creaky Old Hardwood Floors?

[Kenny Smith]

Hey BP!

I have an older home with original hardwood floors.  I also live in a very dry climate here in Denver.  The issue we dealt with when we first bought the investment property is very squeaky floors.  I used squeak away, break away screws, to fix the larger squeaks.  Essentially eliminating the gap between the subfloor and the joists that was causing the squeak.  For the most part, they worked.  

However, I am still finding additional smaller creaks in the floor boards themselves.  Any recommended product out there that helps hydrate or lubricate hardwood floors?

Thanks in advance!