input question: How to clean a curling iron.

output answer: Rub steel wool over the barrel of the iron.

input question: To clean copper, you can

output answer: Use steel wool and Barkeeper's friend

input question: How can you get the dry hair to stick to the beer can when rolling the dry hair?

output answer:
Immediately before rolling the dry hair, Hold the beer can in front of you, and spray hair spray once around the body of the beer can