Observe these rules about when to clean a tape drive:
Clean the drive after the first four hours of use with a new tape.
After that, clean the tape drive after every 25 hours of use to maintain reliable operation.
Clean the drive twice as often if you use it in a dusty environment or operate it infrequently.
Insert a cleaning cartridge into the drive.
The tape should play for a short while, and then eject automatically.
Do not use any cartridge other than a DDS-approved cleaning tape cartridge to clean your tape drive.