One of the main uses of hair sprays is adding volume to fine and thin hair. To use a volumizing spray, first, tilt your head down and shake your head while using the spray on your hair. Then comb your hair upside down. Wait a few seconds for the hair spray to dry and return to your initial position.
To achieve more volume, instead of spraying only on the surface layers of the hair, divide your hair in parts and spray under each part near to scalp. Then hold the hair until the spray dries. Afterward, gently comb the hair in the desired direction without destroying the volume.
The important thing is not to spray the surface layer of the hair only as it can make the upper layer heavier and as a result, the hair will not look voluminous, especially if you have fine hair.