Clean lime scent. Haven’t got to use it in my home carpet cleaner yet... Many reviews claiming leaking product on arrival and it really does. The detergent screw type lid was tight and there were no cracks or busted plastic- it must be a manufacturing issue that is not sealing the cap well. It needs a pull tab like a bleach jug.My Amazon rep handled the issue politely and I’m looking forward to trying the remaining carpet shampoo from this brand! Why? - I’ve used the BacOut stain/ odor remover as a carpet pre-soak over (ugh..) cat urine stains. Bad ones. Lots of unhappiness from this particular cat... I soaked the areas (ok, drenched them all the way through, but it says to!), did a carpet clean using a little home Hoover carpet cleaner w/ some more BacOut+EOS detergent+a tiny bit of snuggle, did another full strength BacOut soak and then a wand extraction on the really nasty areas- my cleaner has a wand like a shopvac so I got real serious by the baseboards (grumpy cat parents understand my pain)... The smell DISSAPEARED after it was good and dry a couple days later using a fan (drenched remember?).Like to think it really was all the enzymes going to work. Didn’t feel or smell to confident while it was damp- it had a slight mildew/lime scent but it ALL dissipated and left my house and carpet (that I knew was completely ruined) smelling SO FRESH with no lingering cat urine odors.Looking forward to trying this real shampoo by the brand I know really works for my needs. Their website lacks info on their product differences but I’m hoping BacOut for the serious work and this shampoo as a second layer of defense.