The best way to clean DVD lens?

I'm sorry for such simple question but what is the best and safest way to clean DVD lens? Couple days ago my player (Sony DVR-...) began to have some problem with reading/playing DVDs. Sometimes when I insert recorded Taiyo Yuden DVD+R, the player just reads "C 13:00" error, but after ejecting and inserting again it is working properly. I think the problem is in DVD lens. Or maybe I'm wrong???
Thank you.

 

go to wal-mart and buy a lens cleaner

 

radio shack has a really nice one too.it will even test alot of other things too, like your surround sound and other features.

 

Does it matter what brand of cleaning disk? I do have something from my CD player. Could I use it?

 

if it is the one with the little brushes on it it should work fine

 

OK, thanks.