That awkward moment where you pull out dry, fluffy laundry and realize you don't know if you used laundry detergent.
Also that awkward moment where you realize you still have latent OCD hygiene issues.
Wouldn't your nose be able to tell you?
I use unscented soap because I have allergies, so, not by the smell of soap, or lack of smell of soap. My workout clothes still smelled like sweat, though, which is why I suspected I may not have used detergent. Rewashing made the desired improvement- though, with the workout clothes, they'll prolly never exactly be mountain breeze fresh, considering I'm doing cardio in them on a daily basis.