After my DGS used this solution on his skunky dog, he suggested I try it for getting the musty smell out of an old storage trunk. I halved the recipe and only used 1/2 tsp. dish soap. After applying it liberally throughout the inside of the trunk, I then wiped it out and left it open to dry. The musty smell is absolutely gone and I'm so happy. Thank you Yoster!
This really does work. It also work to get strong urine smell out of my rug. You might have to do it twice but it is a keeper.