How do you clean a stinky futon?

For sanitizing a stinky futon:

1. Vacuum it to remove loose debris.
2. Sprinkle baking soda over the surface, let it sit for a few hours, and vacuum it again.
3. For persistent odors, try a vinegar and water solution or a commercial odor eliminator specifically made for fabrics.
4. Avoid soaking the futon and let it fully air dry before using it again.