A few months ago, all the targeted ads online decided to convince me I needed a blow dryer brush. I literally could not open Facebook or Instagram without seeing an ad for one brand or another's version of a hair dryer brush. This blog post contains Amazon affiliate ads. I may earn commissions, at no cost to you, for orders placed through these links. Read on for my review of the Revlon One-Step Hair Dryer Brush. Spoiler Alert! I ...