What is the consistency of the Finish Line Dry Teflon? I am doing some test for my home purposes of different lubes, and I was quite surprised I have three bottles of Finish Line Dry Teflon with two different forms. I shook all before applying and the bottle I have from the old times have foam like form (it liquefies after a while), but in two new bottles I have a water-like consistency (or even with less viscosity), no foam for sure.

I checked Finish Line video, from the shots presented it looks to my eye like light foam there. The video is from 2013. So my question is -- should be foam-like or water-like? Did FL change the formula (the bottles except for DuPont labels look identical)? Or does the form change in time, meaning fresh lube is water-like and it becomes foam in time. Or this is product which varies from item to item (low quality control)?

Unfortunaly I am unable to recall what was the form when I bought the old bottle, because it was some years ago and meanwhile I used other brand.
I'd guess the old bottle has lost some of its carrier fluid (the clear liquid that separates on-top when the bottle is left to stand) and when shaken, the old bottle has a lot more of the lubricant compared to the newer bottle.

Either chuck the old bottle, or add a very small amount of something volatile like methylated spirits perhaps and use it up on a junker bike.  

Only use the newer stuff on your good bikes.