My washing machine smells. The inside smells musty/moldy. It washes fine and the clothes don't seem to smell. Yet, the musty smell is getting worse and I don't like to wash my clothes in it because of the smell. I don't want to buy a new washing machine just because it smells as it works fine. So how do I clean the machine and get rid of the smell? Vinegar and baking soda are not doing the trick.