2. Apply the Hair Straightening Serum Over Damp Hair
Once you've washed your hair, take a towel, and dry it a bit. Apply a hair straightening serum that untangles the strands, and makes them straight. Just so you know, hair straightening serums are designed specially to render straightness to hair. So, when you're done applying the serum over your damp hair, take the paddle brush, and follow the next step.