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Christine recently reviewed the PhD Heat Styling Spray by Living proof in a video. She was excited to try this product as she had never used a heat styling spray before. After using it before curling her hair, she was impressed with the shine and volume it provided. She mentioned that the spray can also be applied after styling to set and smooth everything. Christine loved the scent of the spray and found it easy to use by holding it 6 to 10 inches away from her hair and spraying it on in sweeping motions. She also noted that it acted as a heat protectant, which she believed contributed to the shiny result. Overall, Christine gave the PhD Heat Styling Spray a perfect rating of five out of five stars and mentioned that it would become a staple in her haircare routine.