Let me drop this tips for those that have dandruff issues.
Let say you bought Shampoo and instant conditioner for dandruff treatment.

Now see the way to go about.

On the wash day, allow the instant conditioner sit for 30 minutes,then rinse with warm water, not hot,not cold ,just a little bit warm.

After a week,rewash again,do the same thing.

Someone that has serious dandruff should not Carry hair for a whole one month without washing.

No please that rule should not be for you, because is not about the hair now, but your scalp.

Every week try aleast once you wash,and allow your instant conditioner to sit if you don't have time then every two weeks.

Then apply your oil.

Do it for a period of 3 months,and you will notice a different.

Before you make any hair you can carry for a month, try treat for a period of 3 months first.

It will help you.

Don't just be doing that one time treatment a month,it won't help issues.

Then each wash day,treat it with that instant conditioner and oil.

Don't skip that scalp treatment.

Before you deep condition is it.

Continue doing it, then you will see dandruff will leave your scalp.

Growing hair is a skill