This is our preferred nut and saddle lube after trying all the usual suspects.  It minimizes friction nicely, doesn't build up and, most importantly, does not affect the sound or sustain of the strings.

A lot of what I have tried in the past kills the tone, and we have found TUNE IT does not dampen the tone at all while keeping the guitar in tune longer.

We use it and it works quite well, a great addition to your line.

I have to say, Tune It is AWESOME !! I've tried a number of different lubricants and by far this makes a huge difference. Very impressed.

I've used all the products out there that claim to lubricate string friction points on guitars. They've all worked ok but most leave residue, dry out or slightly dampen the strings. I started using this stuff in my guitar repair shop, String Theory Guitar Repair, and it's unlike any other product I have used before. A little goes a long way and I've already noticed that it all but eliminates return to pitch issues when using tremolos. I use it on every instrument that crosses my bench now. I use it on bridge saddle, nuts, string trees and even on the exposed gears in open back tuners. Great stuff!

Using this on the nut made the difference between tuning every song and tuning every set.

Just wanted to take a minute to tell you guys how much we love the Tune-It product. Our techs choose what products they want to use from the products we provide. Tune-it has made it onto every bench in the shop and is now part of every job we do that requires slacking the strings. We use it on acoustics and electrics in the nuts and on the saddles. Also the under side of string trees, especially helpful with trem systems. Helps guitars get in tune and stay in tune. Thank you for a great product.