If you smoke in your home and you would like to sell your home, you need to roll up your sleeves because smoke removal is not a simple process. Let's start with step one, STOP SMOKING! Your home AND body will thank you! Next, try having your air ducts professionally cleaned. Clean your walls with a soap, water and a vinegar mixture. Green Apple Dawn seems to work well. Have all flooring and furniture professionally cleaned. Clean all bedding, clothing, towels, etc. Remove any fabric window coverings and throw away! These steps will help but often the smell requires more attention.