Clarify Balancing Serum for Oily Scalp

Is the bottle recyclable? Is the serum sustainable?
Can I apply this serum only to a clean, towel-dried scalp? Or can I use it in between wash days on dry hair?
Can I use the Clarify Balancing Serum for Oily Scalp if I have a sensitive scalp? If I use it regularly, will it dry out my scalp?
How does this serum control oil?
Can I layer my regular styling products over this serum?
Do you have to rinse out the Clarify Balancing Serum for Oily Scalp?
How long will a bottle of Clarify Balancing Serum for Oily Scalp last?
Does the Clarify Balancing Serum for Oily Scalp contain fragrance?