For a long time I have a printer that can print on CDs / DVDs. Now the difference between the white coating to Verbatim is really considerable. I get no clear duress, it always looks blotchy and streaky, and I have no desire, so to make white backgrounds simply because these discs are poorly coated.
Conclusion: better to spend a little more money next time ...
PS It's not the clean or not clean the print head.