Can someone tell me how to use this kind of stove ? Is it true that only works with metallic pots, since the top is flat, I must use flat bottom pots to get larger area of contact ? + ^ _3 Z. q2 |. r h , v4 l7 \( o3 Y6 Y/ S- aAlso what's the difference between current model of Malata Karaoke player compare with earlier models ! t! q8 w' _3 BThanks for help.