Need help with my guitar

It happens when the strings are either very new, or very old. Maybe you didn’t string it properly (I.e. tight enough) either?

Agree with both of the above. New strings will tend to stretch for a day or so - particularly cheaper strings.

But some guitars, when you tune down, the strings don’t fully slack right away, and they’ll lose tuning after a few minutes of play.

The trick then, is to always tune UP instead of down. Alternately, if you do tune down, pull up on the string a little to get rid of any slack.

If none of that works, you may be doing something wrong. Does your guitar have a lock down that you’ve neglected to loosen while tuning? Have you checked the truss rod to make sure there’s not something wrong with it?

if you just re-strung your guitar, go up and down the neck bending the strings (like you were playing and bending a note). this will stretch out the strings

it may also be the tuning keys. they may be pieces of junk and dont stick. the only way I know how to fix this, is eitehr go buy a new guitar or get new tuning keys

also, the piano could be out of tune. haha

if this doesnt work, funmail me and ill see if I can help anymore

Perhaps its the strings, or maybe its your piano? lol It might be that the strings arent tight enough so after you play for a awhile it just goes out of tune. Im not sure though this has never happed to mine either!

You probably need new strings. And if they are new, they need about a days time to stretch so tune it throughout the day when you can