Magic ROOT Cover Up (Blondes with Dark Roots)

So I have quarantine roots, like so many others. My hair is a bright bleached blonde, with light brown roots. I bought this with high hopes, but when I spray, nothing happens. Nothing. I sprayed my...

Hmmmm...Where to start..lol. I'm in desparate need to do my roots. I had my hair touched-up a week before the official quarantine had happened where I live. Well, 2 months later, my lovely roots...