I have a sleep number i10, double twin xl.(king).the bed is set at 30 soft. When I wake up it feels much firmer, causing discomfort, especially in the hip. How do I correct this.

Contact the manufacturer, that's your best bet.

Good luck. :)

Is the actual setting still at 30 when you wake up? Did you get a manual with it? You may have to experiment with it before you find your best comfort setting.