The outbreak of conjunctivitis at London Fashion Week is being blamed on unclean make-up brushes which has led me to wonder how many people clean their make-up brushes. It is one of those things that often gets forgotten about but I realise how important it is. They say that good brushes which are looked after could last a lifetime! So how often do you clean yours?

The brushes pictured are a set by Bobbi Brown for £40.