Wondering what to do with all the lemon peels after you hand squeeze 4 cups of lemon juice? I thought the same thing! I felt bad just throwing them all away, so I did a little research to see what I could use them for. Turns out you can simmer lemon peels in water to give your house a nice lemony smell to it! Try it then next time you have lemon peels to dispose of. You will love the fresh clean smell.