The Pioneer A03 I had was actually one a friend asked if I could repair. He got it 2nd hand as a non-functioning drive about three years ago as it would not even recognise any discs, never mind write one. When I went to have a look at it, I had to dismantle it to get at the internal mechanism. From what I recall, I just used a Q-tip to clean off the surface of the laser lens and got it working, however no matter what I tried, it would not read pressed dual-layer DVDs or write faster than 1x. However at the time I never actually used a cleaning disc in the drive since I cleaned it manually. But then again, the writer came in handy considering new DVD writers were well typically â‚¬250+ back then.
So far, I haven’t encountered anyone who had DVD player or PC DVD-ROM issues as a result of cigarette smoke, but then again this is possible. If you do decide to use cleaning fluid, I would recommend doing a residue test first: Get an unwanted disc (such a failed CD-R) and ensure its surface is clean. Now, place it silver-side up in a place that will not be disturbed and put a few drops of the cleaning fluid you intend using on the disc surface. Leave it to dry off and then carefully look at the disc surface to see if any residue remains. In fact, when I tried this with the cleaning-fluid that came with my wet/dry laser lens cleaning disc, I was shocked to see clear residue marks remain after the drops dried up. Otherwise, if the liquid completely evaporates without residue, it should be safe to use in my opinion.
From my experience, so far I never actually seen a DVD player, Hi-Fi, DVD-ROM drive or anything else that can play CDs ruined by a dry-based cleaning disc. However, I would discourage using cleaning discs with long brushes in a PC drive as I once had one of the brushes come off in a PC drive , likely due to the high rotational speeds these drives spin at, however no harm was done even in this case.
Good luck getting your player running back to normal