DURABRAND A160 RECORDING AND FORMAT PROBLEMS?

I HAVE TWO DURABRAND A160 RECORDERS WHICH OFTEN FAIL TO FORMAT DISKS CORRECTLY FAILING AT ABOUT 98% OF FORMAT RUN TIME ALSO THE RECORDERS OFTEN FAIL TO RECORD OR HAVE PROBLEMS PLAYING BACK ITEMS RECORDED ON THEM . I HAVE CLEANED THE LAZER BUT THIS DOES NOT CURE THE PROBLEM ANY SUGGESTIONS ON CURING THIS PROBLEM. THE RECORDERS WILL PLAY BACK PRE-RECORDED DISKS WITH NO PROBLEMS