laundry - How and why I am getting this on my jeans? - Lifehacks Stack Exchange

I been getting these lines on my jeans and I don’t know why. I wash them and tumble dry them. Is it because of washing or drying? Can I fix it? Seem most of jeans have it.

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laundry - How and why I am getting this on my jeans? - Lifehacks Stack Exchange

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