Worried about infections being spread by telephone handsets? Jon Roberts of Great Falls, Virginia, has a simple but effective answer (GB 2383225).
The cradle for the handset houses two small lamps that beam ultraviolet light into the handset for a set time when it is not in use. One lamp radiates UV wavelengths of between 200 and 300 nanometres to kill bacteria and viruses. The other works below 200 nanometres to generate small quantities of ozone from oxygen in the air. The ozone penetrates cracks and crevices to kill any bugs lurking there.
