The plum effect is when you do your number two in the toilet and when you flush you will see all the droplets coming out that will disseminate around the venue of the bathroom. It was almost like another linch of snow coming out of the toilet and that plum effect has a huge consequence. It's actually getting your droplets, your fickle material that you flush and up of course all around you but also end up being on your mobile phone. Remember that actually people use mobile phones in the toilets quite often. It's a fact people use mobile phones in the toilets. So when you wash your hands, yes your hands are clean. However when you touch you feel free mobile phone, what happens is you contaminate yourself all over again. If we don't decontaminate our mobile phones, it means that we negate the hand washing.