How should I apply this oil to my hair and scalp to avoid it being hard to wash out?

Because SATTVA castor oil is highly viscous, the key to using it effectively on hair is moderation. It is traditionally used as an intensive pre-shampoo mask rather than a leave-in conditioner. Apply a small amount to your scalp and massage it in, focusing on areas where hair feels dry, tired, or stressed by styling. You can also apply it to the lengths of your hair to help condition the shaft and reduce the appearance of dullness or split-looking ends.

To avoid the oil being hard to rinse out, especially if you have fine hair, do not apply it generously. A little goes a long way due to its dense nature. After allowing it to sit for a period, wash your hair thoroughly with shampoo. You may need to shampoo twice to ensure all the oil is removed. For brows and lashes, use only a tiny amount on a clean applicator after cleansing to avoid irritation or blurred vision, and keep the product away from the immediate eye area.