Glatt Strong Hair Straightening Defrosting Cream 82ml is not recommended for use by those who are allergic to straightening or perm products. Do not use if your scalp is irritated or injured. It is not recommended to use Schwarzkopf Glatti again until six weeks have passed since you last used it. When straightening with Schwarzkopf Glatt, use non-metallic tools - only plastic or wood. Separate your hair - start from the nape of your neck and move towards the front. Each horizontal section should be approximately 1cm wide and the vertical section 5cm wide. Rinse thoroughly with warm water until all the defrizzing cream is removed (for 5-8 minutes depending on the length of the hair). Apply the cream and wait for 5-10 minutes. Rinse and dry. Use suitable gloves when applying the Schwarzkopf Glatt defrosting cream in the tube to the hair lengths.