£500 blonding service.Beautiful clean lift.Then one dirty section clip fucks the whole thing up.And no, this is not a formula problem.It’s not the bleach.It’s not the toner.It’s not the brand.It’s a you fucking problem because you didn’t check the clip.These are the tiny salon mistakes that can turn into expensive colour corrections very quickly.If you want to get better at diagnosing colour properly, predicting what the hair is going to do and fixing problems without panicking.