Using these D'Addario XT electric guitar strings is easy. First, remove the old strings from your guitar. Then, thread the new strings through the bridge and the tuning pegs, making sure they're properly seated. Tune the strings to the right pitch. When you're done playing, wipe the strings with a soft cloth to keep them clean. Avoid exposing the strings to extreme humidity or moisture as it can speed up corrosion. Also, don't over - tighten the strings when tuning to prevent them from breaking. If you notice the tone starting to dull, it might be time to change the strings.