To keep frizz at bay, limit washing hair daily. “Curly hair needs moisture to thrive, and overly cleansing your hair resets natural scalp oils that help keep hair bouncy and soft.” A general rule of thumb is to lather up no more than four times a week if you have looser curls. Coily hair or tighter hair types can opt to co-wash once a week with a regular shampoo session every month. If you’re not sure what your schedule should be, if your curls are feeling thirsty and dry, try shampooing less often. This also means you need to amp up your scalp care game: “Because of less frequent hair washing, some scalps can get buildup, which if left untreated, can cause flakes and even hair loss,” says Jarman. On wash days, exfoliate your scalp with Sunday Riley Clean Rinse Clarifying Scalp Serum with Niacinamide, which features an AHA/BHA-infused formula designed to remove excess oil, dead skin, and buildup. No matter your hair type, “a healthy scalp is imperative for healthy hair,” says Jarman.