Do you have legs that you use to ride a bike? If so, then you've probably had grease stains on your fancy pants more than a few times.
Don't worry. Keep your legs. They aren't the problem. A dirty chain is the culprit. With a few steps you can guarantee those stretch jeans remain ridiculous and dirt free.
A few Items you will need:
Let's get started.
If you chain is worn than it might need to be replaced rather than refaced. ( it rhymed.... leave me alone)