Using this turntable stylus is easy. Just carefully install it on your Sansui SN505 or Teac TSF8003 turntable following the manufacturer's instructions. When using, make sure the turntable is on a stable surface to avoid any vibrations that could affect the sound. As for maintenance, keep the stylus clean. You can use a soft brush to gently remove any dust or debris after each use. Also, store the stylus in a safe place when not in use to prevent damage. If you notice any significant changes in the sound quality, it might be time to check the stylus for wear and consider replacing it.