It's clear that a dry lubricant is the best option for a squeaking staircase, in order to avoid damaging the wood or causing the staircase itself to become unsafe.
When it comes to the best product for the job, this dry WD-40 lubricant is a good option. And as shared earlier, this is one of the top-rated dry lubricant options on Amazon.
Any regular talcum powder you happen to have at home can also be a great fix – as can graphite powder, of which there are plenty of options that you can buy in stores or online.
Greg warns though that a dry lubricant may not keep your staircase squeak-free forever. 'In some cases, a lubricant may be effective in reducing or eliminating squeaks caused by friction, however, the effectiveness is reliant on the materials used in the staircase, and the amount of foot traffic.'