The frequency of washing your hair depends on various factors, including your hair type, lifestyle, and personal preferences. As a general rule, aim to wash your hair at least twice a week to keep your scalp clean and free from excess oil and product buildup. However, be careful not to over-wash your hair, as this can strip away natural oils and lead to dryness and irritation. If you have particularly oily hair, you may need to wash it more frequently, while those with dry or damaged hair may benefit from washing less often and using a gentle, moisturising shampoo and conditioner free from harsh ingredients like sodium chloride or potassium sorbate.