Samsung DVD Decorder

Hi All,

I usually recording programs from DaAi TV. Usually i have to format the DVD disc when inserting a new disc, but it shown as "Unknown disc" or asked to format the disc again lately after some recording were on the DVD disc (from time to time, i.e. on-off-on or on timer recording etc). I have tried to use the DVD disc cleaner but the problem still exist.

Just wondering anybody having the same experience and know how to fixing it?

Thank You in advance