There are many simple machines used in the home. One is the toaster. I could name more but the question only asked for one machine.
they are very simple and their is like so many things that fit in your home.
fasten?
pulley
A pulley.
lever
simple machines are used by being pulled or pushed
An airplane is not a simple machine. A lever is a simple machine. A wheel is a simple machine. Any machine that can be described by a mathematical formula is a simple machine.
A winch.
wedge
Wool
because they are very important to the world and we use them everyday such as a wheel and axle that are used on doorknobs.
washing machine