How to use an iron
1. Prepare the iron, the clothes, a place mat or any flat surface board, some clothing hanger.
2. Plug the iron cable into an electricity socket and wait it until get warmer.
3. Place the clothes on the place mat.
4. Apply the iron on the clothes surface evenly.
5. Flip the clothes and apply the iron on the other side of the clothes evenly.
6. Put the clothes on the clothing hanger
7. Continue with another clothes.
Question
….and wait it until get warmer. The word (it) refers to…