Dry Cleaning is an art and the chemical used during the cleaning process is very dangerous for human health as well as the environment. They are equally bad and harmful for the clothes as well if not controlled properly and handled with care. One of the best examples is the sickly sour and sweet smell coming from the clothes that have just been delivered back to you from your dry cleaners.
The smell means that your clothes were treated properly and underwent a proper dry cleaning process as the smell is not like the smell of any detergent. This sour or sweet smell also indicates that your clothes have passed through a chemical process which is dangerous for the environment.
Dry cleaners use them with due care under a very controlled environment to save both humans and environment. Many people think that the dry cleaning is a simple process and can be done at home.