A lot of musicians mistake their guitar tuning problems as a guitar problem. More often than not, the guitar is not the problem. Tuning problems are likely the result of strings that have not been stretched properly.
When you stretch your strings using the conventional method of pulling on random areas of the string with your fingers, it causes an uneven stretch. Even using the "thumb and fingers" method is problematic because it hurts and takes at least 45 minutes.
STRETCHA saves time and agony; taking only 5 minutes, pain-free, sliding up and down the strings evenly giving each string a proper stretch and allowing your guitar to be perfectly tuned instantly. This results in a better sounding guitar, as the strings will ring precisely and consistently with each strum.
Battlefield-tested in studios and by the world's most notable guitar tech pros, we are proud to say that STRETCHA has passed with flying colors.
1) Change your strings and tune guitar.
2) Starting at the bridge, insert the string in the front groove followed by the back groove, which we call the "heel".
3) Holding the tool, gently lean your hand back so the string at the heel is parallel with the other string. (Fig 1.)
4) Don't pull "up" too high (Fig 2.) or drag the heel on the fret board. (Fig 3.)
5) Keeping the string at the heel parallel with the other strings, slide the tool along the string toward the nut (the tool should go as far as the first fret). Then, pull it back to the bridge.
6) Tune and repeat this procedure - we recommend doing this twice. Sometimes a third stretch is required, usually with thicker gauge strings.