I'm curious what it's supposed to look/smell like when it's new. I purchased a gallon can at Auto Zone and used it for the first time today to clean carbs. I stored it in a warm area on a wooden shelf per instructions since purchasing a month ago. It's a brown syrup like consistency and doesn't seem to do much or have any solvent odor. I left a carb in there for over an hour and it was pretty much exactly the same as it went in. Dirty/oily on the outside and deposits in the corners inside. Was I expecting too much, like for it to anything for example? Thanks.