It's been a tad too long since we've had a haircut, and our ends are showing it! In between appointments, we treat our overextended strands to Smooth 'n Shine Therapy Scalp & Breakage Miracle Leave-In Treatment Conditioner: Most days, it's the only product we leave in our hair. It nourishes and repairs with jojoba oil and wheat protein without feeling heavy or greasy. It's a bargain at $4—and the faint take-me-away coconut aroma doesn't hurt, either. What's your favorite leave-in hair product?