Translation of "Leftover" in Japanese

Take the leftover food home with you.

食べ残しはお持ち帰りください。

There's some leftover food in the fridge.

冷蔵庫に残り物があります。

With this you can make a clean sweep of leftover breakfast smells and such to make the air clean.

これで朝ご飯の残り香などを一掃して空気をきれいにできる。