There is lots of stuff to wash dishes with in the bathroom, in a blue bowl on the floor. There is washing-up liquid, a dishtowel on the shelf below the microwave oven and a washing-up brush. I'm sorry about the difficulty you had turning on the shower (the switch for the hot water is on the wall outside the bathroom). Instead of telling me after they have left, I hope future guests will ask me if they have any questions, while they're actually there. I provide a phone with a HK number for this very purpose.