To use these Thomastik - Infeld Dynamo violin strings, first make sure your violin is tuned to the correct pitch. Loosen the old strings and remove them gently. Then, thread the new Dynamo strings through the pegs and the bridge, and start tuning. Remember to turn the pegs slowly to avoid over - tightening. When it comes to maintenance, wipe the strings with a clean, dry cloth after each use to remove rosin and moisture. Store your violin in a suitable case in a stable environment to prevent damage to the strings. If you notice any signs of wear or fraying, replace the strings promptly for the best sound quality.