Tinted formulas solve the residue problem at the root. Moroccanoil, which started when Carmen Tal discovered argan oil after a bad color job, makes a version for dark tones that leaves no chalky finish. Verb's refresh spray is tinted purple to disappear in lighter hair, from the brand that began in Austin barbershops. Bumble and bumble's Brownish gives matte fullness on brunettes. Vegamour, founded by Daniel Hodgdon in 2016 around red clover and mung bean, makes a plant-based, talc-free dry shampoo that absorbs oil and lifts hair at the root. Match the tint to your roots, not your ends.

If you prefer no aerosol, the last row is for you. Nancy Twine left Goldman Sachs to start Briogeo in 2013, and its powder puff presses powder straight onto roots. Ceremonia's powder pouf, from Babba Rivera, handles greasy roots at home or in a bag. Living Proof's sheer mist uses micellar technology for a weightless feel, and Mane, Jen Atkin's brand that grew out of her Mane Addicts site, makes a foam to refresh hair and extend a style. What I would skip is using dry shampoo for days in a row without washing. It builds up on the scalp, so wash properly at least every few days.

Apply the night before if you can, so it absorbs oil while you sleep. Section your hair and spray only the roots. Brush through after a few minutes to spread any residue. Wash with a clarifying shampoo once a week to clear what is left, and cut back if your scalp starts to itch. Keep a travel size in your bag for the gym. If you want to keep browsing, I also put together Hair Lightener Guide and The Best Shampoo for Dry Frizzy Hair Starts at the Cuticle.