John Lewis sofa (CB1)

This is a 10 year old sofa I just got from previous owner. There is one leg whose screw is half broken inside so it can not screw in now, but if you insert it in, it can still support the sofa, just a little bit shake if you push it. It was from a home without pet and smoke but it was placed near kitchen so some seasoning smell. I tried to clean it a bit but still have marks. Nice project for someone good at DIY.