Hair oil can sometimes have a bad rep, so I'm here to fix that! It's a common misconception that hair oil is for use on dry hair (after styling, say), but it's actually a great treatment before you wash your hair as well. Pop a generous amount through your locks five to 10 minutes before showering, and then wash as normal. Your blonde hair will feel silky and look healthy afterwards. I like Kérastase Paris Elixir Ultime ($48.50).
Kérastase Paris stockists: 1300 365 552