From: Jennmommy4

try renting one of those steam cleaners from the grocery store or usually uhaul has them and also small machine rentals or even walmart may have them.Hot water and some oxi clean followed by a few spays of febreeze or any fabirc refresher you life should make them smell great and look great.I just did this with my sofa and chair and had great results.Make sure you get the attachments sometimes the cost extra but the price aorund here is $22 wich is a bargain compared to paying a service to do this cleaning for you.

From: sully7

Use the steam cleaner like suggested above and then for the deodorizer try this: mix 1 quart water and 2 teaspoons of tea tree oil in a spray bottle and spray the couch like you would with Febreeze. It will smell strong! But when the tea tree oil smell goes away the musty smell will be much less, too. You may have to repeat this a couple of times, but it will work. You can get tea tree oil at a health food store. I use this weekly on a couch that sits on my screen porch in Florida and it works great!