Ours are fine after washing but can be pretty whiffy in the morning and if she's teething then the smell nearly knocks me out when I open her door. Thankfully we've only two more teeth to go so hopefully not too many more really stinky mornings.
Chloe's night nappies have always smelt really strong in the mornings, she is on prescribed high energy formula so I always thought that maybe because she's taking in extra cals it would make her pee stronger away. But I have noticed its a stronger smell when there's microfibre in there and when I've used a Pul wrap. Using wool means I can still smell it but it's not overpoweringly-knock out strong! I think the apple blossom lanolin on the wool makes the smell a bit less noticeable too!! yummy!