CompuServe Messages

I have a NEC CDR-83M which has been acting like he was dieing slowly. The more I use it the worse it works: takes *too* many time to get the CD directory, fails too many times reading files… Suddenly this morning I remember one possible reason for this: it might be dirty inside. I mean the laser lens might be dirty. I would like to hear from those who have experienced this problem before and is someone know about a cd-rom laser lens cleaning kit. Thank you so much for your help! Fernando