The conversation between human and AI assistant.
Which lasts longer: hair smoothening or hair straightening?
That's interesting. Can you give me some tips on how to maintain hair smoothening?
Sure! Here are some tips to maintain hair smoothening: avoid washing your hair for at least 2 days after the treatment, use a sulfate-free shampoo and conditioner, regularly apply a deep conditioning treatment, avoid using heating tools frequently, and use a wide-tooth comb to prevent tangles and breakage.