If you don't have anything on hand or you simply don't have the time, two options are available to you. We play it rock'n'roll by betting on the disheveled side:head down, we crumple the hair between the hands. Then, we fix the hairstyle with a dab of hand cream that we apply on the lengths. If you do not assume this rock look and want a more natural result, wet the hair then comb it with your fingers. This automatically "erases" the crease.
We use a dry shampoo (taking care to shake it well before) that we apply at the root, 30 cm from the skull, without putting too much on (you can always put some back on afterwards). Then, we brush all the hair to distribute the powder and remove the crease. You can also wet the hair with styling water or a spray. After brushing them, dry them with a hair dryer. If necessary, we finish by smoothing them. There, we assure you:not a crease will resist!
Thanks to Pauline Gigandet, hairdresser at Coiffirst.