Error mesage on sony dru

anyone else get this message and what does it mean?
does it really mean me sony is dirty

warning (OPC) failed: Code 03 73 03 [Medium error, Power calibration fail (CD-burner is dirty)

I think you are using CopyToDVD!?
I got this message too, but don´t be afraid it is a faulty media.
I bought Vivastar 1x and there have been 8 out of 30 Disc with this fault.
In Nero it says “medium error”.

Try using RitekG3, Maxell, Princo but don´t use Vivastar.
That´s my personal opinion.