We asked hairstylists and other curly-hair experts how to use a hair diffuser to tame frizzy hair and achieve soft, perfect curls, coils, and waves every time you blow-dry. How big of a difference ...

When I began seeing curly hair "routines" on TikTok, I scoffed at the teens discovering the magic of diffusers, scrunching wet curls with a T-shirt, and the occasional finger coil—all techniques ...