The best treatment for squeaking I've found is to put a little baby powder on the leather. Squeaks go right away. Can't speak to any other treatments as I haven't tried, but I like to do things as simple as possible and this is pretty simple to me! Enjoy and be safe!
I've noticed that by wearing mine at about 4 - 4:30 it is much more comfortable and user friendly. Quick and efficient draws as well as being able to sit comfortably! Im loving this holster so far.. still no squeaking that I've heard about.
It's encouraged me to even break down and do a total clean up and polish! Im sure if it could smile it would have a big sh*t eating grin :-D
I got mine today as well! I can agree with all of the hype about his holsters. Worn it for half the day already and you can barely notice it.. until I sit down. Im wearing it at about 2:30 but its nothing I can't live with. Im a thin guy and it's not even noticeable! Shirt out or tucked in it's the same.
I also would like to note that I haven't noticed any squeaking with mine!