This is one of the most popular and effective ways to use these ingredients. Warm a carrier oil like coconut or olive oil and add a handful of fresh or dried rosemary leaves along with 5–6 whole cloves. Simmer on low heat for 10 minutes. Let it cool, strain the mixture, and store it in a bottle. Apply this oil to your scalp, massage gently, and leave it overnight or for at least 2 hours before washing.