Forum:Maintenance Cost ?

I have a question in regards to the maintenance cost of Grapple Blocker and Mind Protector my question is do you have to pay the maintenance cost when the cards are face down, or when they are face up.

Also, when Destructotron is on the field, and you control a face down Psychic Monster ie Mind Protector how do you keep it on the field, without revealing to your opponent that you control another Psychic monster.

Duelist33(My Talk) 18:28, 25 March 2009 (UTC)