I agree with David Precious, (above). Most people know about bleach and mould. Many of the more expensive brand named bleaches are labelled as containing 'Mould and Mildew Remover'. I don't understand why people don't do it themselves OR sleep in the damned room themselves instead of giving it to young, underdeveloped lungs. So irresponsible. In my student days my house-mates and I had to bleach down the freezing cold bathroom walls (3 outside walls; lean-to) weekly at a mimimum. Cheap bleach is affordable on any income.