Massage mayonnaise into your hair thoroughly, starting from the roots to the hair ends. Then pile your hair on top of your head and cover them fully with plastic food wrap. Wrap the pre-heated towel around it and keep it on for 10 minutes. This will help in deep-conditioning your hair. Now, replace the towel with another pre-heated towel and leave it on for 10 minutes too. Now remove all the wraps and shampoo your hair. This cholesterol treatment once a month for your hair will keep it soft and shiny