I have fine hair, and it’s hard not to burn with envy when a friend tells me they only have to wash their hair “once ... your hair,” adds stylist and salon owner Christine Bellemare.

Knowing how to wash hair properly is a game-changer – because what is it about salon-fresh hair that leaves it so swishy, bouncy and glorious? Even if you’re not booked in for a blow dry, the wash ...