Pet urine and red wine stains can be difficult to clean up. Ever try club soda on them? First blot the liquid with an absorbent towel to remove as much as possible, then pour some club soda on the area. Let sit a few minutes, then blot with fresh, dry towel.
Prevention shares a number of other clever uses for club soda, such as cleaning bird droppings from you car, using it on your houseplants for the nourishing minerals it contains, assisting in loosening a tight screw (the bubbling actually helps dissolve the rust and sediment buildup), and cleaning up jewelry.