How do you use a domestic steam press to iron duvet covers and sheets inthe best way?

On your ironing board, wrap around sheets of aluminum foil. this reflects the heat from your iron. Then heat your iron up it's hottest steam setting. Fold the duvet into four so it's in one long column. Then spray with water either with the iron or a separate spray bottle if you have one so the duvet is slightly damp. as you start to iron make sure you go over the duvet several times, carefully pulling the duvet over the board as you go. Once you get to the end turn the duvet over and iron the other side. You'll have a lovely flat duvet which will make a big difference when you put it on the duvet, no matter what people say.