Asda have some good offers on cleaning materials at the moment including
Mr Muscle -£1.50 - Three pack of Kitchen, Window & Glass & Bathroom -500ml each -
Vanish stain remover 1.5kg - £6
Flash - 2L - £1
Flash & Vanish offers online but Mr Muscle seems to be instore only
Mr Muscle bottles are online at £1.57 each so less than 1/3 full price for three pack.