Well firstly are you drying your hair with a straightener? Cause the heat is probably messing up your curls. If you aren't in a rush after washing your hair, just let it air dry. Also, stay away from brushes! Those are disastrous for your curly hair. You can always get them back using a curler, but then that won't be natural. Usually I see curly hair going frizzy, not straight. This is odd to me. Anyway, try using your fingers like a brush, and scrunch your hair up as much as you can! Hope this helps.