Barry,
I watch way too much late night TV, that Pooph! commercial comes on at least a dozen times in an hour, I figured my television was trying to give me a hint... haha.
I would definitely use it as a last ditch effort, expensive obviously... and when I used it I washed only a flannel shirt, T shirt and jeans, soaked it in the stuff for a couple hours and air dried after. I still thought I smelled it as it came out of the washer, but the next day when clothes were fully dry it really was gone.
My sister is a home health nurse for elderly people who need 24 hour care. I remember her saying years ago that she uses liquid disinfectant/antibacterial multi purpose cleaner, mostly Pine Sol, to wash clothes and bedding for patients with UTI isuues. Because that's caused by bacteria the odor lingers after regular washing I guess, the cleaner eliminates the odor better than regular soap, basically killing it in the fabric. Body odor comes from sweat and bacteria as well.
She said she read on the bottle it was safe to use and that's how she got the idea, and in writing this I googled and found that the Pine Sol website actually recommends it as safe for laundry use
In writing about the Pooph! experience this slipped my mind til just now. Poofed right out of my head I guess

Similar to Jamiel, but you might already have it in the house.