I'm not a fan of deodorizing sprays. My two seem to hate them. As long as you keep them clean and they don't have any skin issues...the puppy smell usually goes away as they grow up.
If it's a 'wet smell'... I'd ask the vet to check and see if there are any issues? If not, maybe you're worrying too much.
Call me weird, but I miss their puppy smells. Haha.. it was a little stinky, but I liked it because I knew it'd go away as soon as they weren't puppies anymore.