The other evening I was washing my car, and it was in the mid 40s outside. I had my bottle of Optimum Car Wash sitting by the edge of the garage while I washed, and when I went to refill my washh bucket with warm water and add more Optimum wash I noticed something strange with it. Instead of the Optimum Car Wash having the liquid like consistency of a typical car wash soap, it was really thick when trying to pour it out. Once it made contact with the warm water and sparayed with the hose, it seemed to sud fine. I was wondering, will colder weatheer have a negative effect on the Optimum Car Wash cleaning or lubricity wise? Even after this exposure, is this bottle of wash still fine to use?