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.
All screws are used as simple machines.
pulley
fasten?
A pulley.
simple machines are used by being pulled or pushed
lever
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.
wedge
Wool
A winch.
because they are very important to the world and we use them everyday such as a wheel and axle that are used on doorknobs.