DLTVS1-CL Sony Cleaning Cartridge - Use this tape as necessary, when the Use Cleaning Tape lamp of the drive is lit, or when a cleaning message appears during the use of backup software. This cleaning tape will provide approximately 20 cleanings. Remember to store your data cartridges at a temperature of between 15 and 25° C, and at 40-60% relative humidity. Also keep away from magnetic fields.