Every time you wash your hair, you should be using a conditioner. Why? When you shampoo your hair, the natural oils that moisturise your strands get washed away. Therefore, you should always use a conditioner to ensure that your locks are moisturised. Not only does conditioner hydrate your hair, but it also smooths your strands and makes them soft and silky. The type of conditioner you should be using depends on your hair type. For example, if you have colour treated hair, you should be using a dye friendly conditioner. To help keep your colour vibrant.