Where are metalloids used in everyday life?

Boron : It is used in many cleaning products - detergents and bleaches.

Silicon : Silicon parts are used in computers, transistors, solar cells, LCD screens and other semiconductor devices.

Germanium : Create alloys in florescent lamps, Solar Cells, LEDs and other light emitting devices

Arsenic : car batteries, added to animal food to prevent disease and to promote growth

Antimony : used in machine bearings, used in way in the production of diodes, Hall effect devices and infra-red detectors,

Tellurium : used in making ceramics, chalcogenide glasses, tinting glasses,

Polonium : Polonium is used to eliminate static electricity produced during processes such as rolling paper, wire and sheet metal.

Astatine : used as a radioactive tracer and in cancer treatment.