There's a big message on Parozone bleach bottles which says "Kills Toilet Germs 100%".
First question: what exactly is a 'toilet' germ? How does a germ know that it is only supposed to occupy one room in a house?
Second question: do rival bleaches kill the germs with less than 100% efficiency? The germs are dead, but not 100% dead. A bit like in that movie The Hitcher when Rutger Hauer has to be killed about three times at the end before he's confirmed as toast.
I think (Jeyes may care to take note here) that the writer actually means "Kills 100% of all toilet germs". This means something rather different from the current formulation, but we don't want to open up a philosophy class here on Washed and Ready.