Use this shampoo when your scalp needs a deeper-feeling cleanse, especially if your roots become greasy quickly or if buildup from styling products makes the scalp feel heavy. For many people, the most practical approach is to begin with occasional use and see how the scalp responds, rather than switching every wash immediately.
Apply it like a regular shampoo: wet the hair and scalp thoroughly, massage into the scalp where oil and flakes collect, then rinse well. Focus the massage on the scalp rather than rubbing the hair lengths aggressively, because the purpose of this product is mainly scalp cleansing. If your hair is long, dry or prone to tangling, you may prefer to use conditioner only on the mid-lengths and ends afterwards, avoiding the scalp if it becomes oily easily.
If your scalp feels comfortable and your roots still become oily quickly, you may use it more regularly within your routine. If the scalp starts to feel tight, dry or irritated, reduce the frequency and alternate with a milder shampoo. Avoid contact with the eyes, and stop using the product if irritation appears.