I think I'm going to experiment with conditioners. I never used to bother but I think my hair's got drier/frizzier over the last few years; I really noticed the difference the sachet of conditioner in my last dye-kit made (er, awkward grammar). For the first time it's made it look shiny and sleek but not gone greasy-looking within 2 days. Possibly, conditioner has changed, rather than my hair.

Anyway. Will report back.