Salt Eraser - Does it work??

Costco had two cans of Salt Eraser on sale for $10 so I figured I would give it a shot.  With my new Weather-Tech floor mats, there wasn't a lot of salt on the carpets this year except where they filled up with water and then passengers sloshed the water up over the sides.  On the front mats this would cause a salt ring at the top of the mats but in back it just ran under the seat in front, here is a before picture:

You can see where the mat ended and the overflow went under the passenger seat.  There was a fair bit of salt build up.  The instructions said for hard salt to put some warm water on it first, which I did.  I didn't put a whole lot of effort into loosening the stain since I figured that was why I bought the eraser in the first place.  So I gave it a good spray and here is the result after two applications:

You can see it worked really well on the light salt stains but there was still some residual from the larger ones.  I did a few spots in front and back and used up about 1/2 the can, so it doesn't go very far, like I said I never had much salt in the car due to my super winter mats.

It was easy to use but I don't think it is worth buying, I could have brought out the mini steam cleaner and did a better job with just a little more effort.  I will use my two tins and won't be buying it again.

Thanks