It sounds like either your laser is getting a bit worn out or your burning your discs too quickly.
I used to use either Ritek G04 4X or Traxdata G04 4X and never had any problems with them.
When 8X G05 came out and I upgraded to a DVR-109 I had a few problems with finding a decent DVD-r brand. I found that RiDisc G05 8X were very good however I always burn them at 4X.
Its basic physics. The slower you burn them, the more time the laser has to make a clean deep burn so basically the slower you burn the better.
The slowest my DVD burner will allow me to write is 4X so I always go for that and always get a decent burn. Well worth a try!!!
But to sumarise, Ridisc should work fine. If they don't then theres a problem with yr laser or try slowing the burn.
Regards
