On LiteON 20x family I only performed laser cleaning on LH-20A1H (LH-20A1L brother on PATA). I did this because one of my 20A1H had issues with recognizing DVD-R written discs. I did not resolve the issue, but as I remember I was able to make proper Lightscribe discs.
I also made laser cleanup on many other models: Plextor, Yamaha CD-RW, Pioneer, LG … etc.
If you are not sure how to do this, I would recommend these:
- Use cotton swabs
- Use isopropylic alcohol
- After you have the cotton swab with some alcohol on it’s head, just clean the laser smoothly and easy … in order not to put to many alcohol and also make the proper cleaning. Wait a minute or two after cleaning and then pack the unit.
Hope it helps