hi everyone! i have an NEC DVD RW drive and would be grateful if i could have some of your valuable knowledge? i have read that using a DVD cleaning disc is not recommeded for the drives used in computers as the brush on the disc can damage the lens? i have used one of these cleaning discs on my LG DVD recorder without any problems, but i am wary of using it for the DVD RW in my pc, which i would like to clean. any help would be appreciated. thanks to all.