Lemon to the rescue
You forgot the pot on the stove and the smell of burnt food assails your nostrils! What can you do to get rid of this smell from your house? Place a sliced lemon in a pot with water and boil it for a few minutes.
Lemon and glass surfaces
If you have a table with a glass top you can squeeze some lemon juice on the glass and then rub it with a paper towel. It will sparkle.