Gray hair follicles produce little oil and next to no melanin, says Richard Korb, a scientist in research and development at Unilever (maker of Dove Hair Care). A glossing treatment can help. A good at-home version costs less than salon, and results last about a week. Try John Frieda Luminous Color Glaze, which comes in five tinted shades as well as one clear formula ($10).

Tip: To maximize post-glaze shine, deep condition weekly to smooth your hair’s cuticle (its outer layer) and create a flat, light-reflecting surface — Oscar Blandi Marine Mud Treatment ($26) instantly hydrates parched grays and will help a glossing treatment endure.

The cuticle of a silver strand tends to be rougher than a pigmented one, creating that wiry, won’t-lie-flat effect, says Teca Gillespie, a Pantene scientist. Glosses and conditioners add smoothness — as does using a boar bristle brush. It will also help to stick with a styler that contains silicone (a cuticle-flattening ingredient) such as Pantene Pro-V Smooth Serum ($7) and Kerastase Oleo-Relax Serum ($34), a potent wiry-strand smoother — a dime-size drop for your whole head is plenty.