I have a 9 year old Wenger Swiss Gear laptop backpack, used it almost daily, but it held up really well- only a couple very-small tears and the colors faded. (https://amzn.com/B0007QCT0G)
But it has taken in a lot of smell--mostly cooking smells (I live in a studio and cook curry once or twice a week) and from some dried out food-spills.
How do I clean it to get rid of the smell and some accumulated grimes? I was thinking a deep soak and soap, but don't want to ruin the bag. How do I proceed?