How can I effectively remove urine smell from carpet padding?

To effectively remove urine smell from carpet padding, start by blotting up as much of the urine as possible with paper towels. Then, mix a solution of equal parts water and white vinegar and pour it over the affected area. Let it sit for about 10-15 minutes before blotting it up with more paper towels. Finally, sprinkle baking soda over the area and let it sit overnight before vacuuming it up the next day. This should help eliminate the urine smell from the carpet padding.