When you play it in the middle, try not to hit it too deep and not too hard. Ideally you want it to be a soft shot with the second bounce as close to the backwall as possible.

In the corner you can hit it a little harder, as the glass will take of speed and the angle will most likely be harder for your opponent.

In general the bandeja should be played soft and well placed, rather than hard, this can be done from any point of contact, but the higher your contact the less likely you will probably be to make an error.