How do I do spikes without using gel?

If you have straight hair, the following method may work for you. This method works well on short to medium-length hair. When you put shampoo on your hair during a shower, lather the shampoo into the hair in a certain motion to keep the hair in a spiked position. For example, if you want to spike your hair straight up, rub the shampoo through your front hair in an upward motion. Don't leave the shampoo on too long (1-2 minutes is enough), as this might lessen hair hold. When rinsing, hold your front hair gently and wash the back hair first. Then rinse the front hair in the upward motion again, gently holding the front hair. When drying, it is best to blow-dry, holding the front hair again.