humble lemon as a remedy for the flu, lemonade or more traditionally the good old gin and tonic.
lemon's cleaning capabilities.
For example if you have a bad rust stain on some fabric you can just sprinkle a bit of lemon juice and salt and leave to dry in the sun.
As well, if you have a rust stain on a vinyl floor or some woodwork you just mix lemon juice in with some baking soda to make a paste and leave it on for several hours and then scrub.
sliced lemon will absorb any paint smells if placed in the room that has just been decorated.