The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific conceptsAll bathroom cleansers say they can kill 99.9% of known germs. What is this one-in-1,000 germ that has a charmed existence?Dennis Hawkins, Leominster, Herefordshire Continue reading…
Source : theguardian.com
Read more…Why do bathroom cleansers only kill 99.9% of germs not all of them?















