How do I use the Power Tub Clean function for a deeper tub clean?

Make sure the tub is empty, then press Power to turn on the machine. Press and hold Super Speed for 3 seconds to activate the Power Tub Clean function, then pour 200 ml of chlorine bleach evenly on the bottom of the tub and press Start/Pause. Do not place any items in the tub while this cycle is running, as they may get damaged or discoloured. (Page 38)