1. First, squeeze your lemons to extract the juice. You can either squeeze them directly into the bottle or use a juicer.

2. You will need around two parts water to one part lemon juice, so add the desired amount of warm water to the bottle and mix.

3. Then simply spray the areas of the hair you want to lighten, or over your whole head if that’s the look you’re going for.

4. Next, sit in the sun to activate the lemon juice – this can be between one to two hours.