It’s possible for new guitars to have burrs on the frets, depending on the maker, or for old frets to become dirty and rough to the touch. In either case, the frets may need to be filed.
You’ll need to remove the strings from your guitar and set them aside.
What do you need?
All you will need for this task is a fret end dressing file.
The filing process
Step 1 – Position file
Holding the file securely in your dominant hand, position it over the fret.
Step 2 – File along fret
Slide the file along the length of the fret, applying light pressure and being careful not to make contact with the fretboard.
Don’t be tempted to apply too much pressure, as this could cause the file to get stuck and then lurch forward. This could result in you slipping and damaging the guitar.