Today I noticed my R-0003 reagent #3 turned blue in the bottle. I have the K-2006 kit. Last time I used this reagent, about a week ago, it was perfectly clear. I searched and only found that it goes bad by turning yellow. I left my kit outside last week as the temps were in the 60s during the day and the 40s at night.
Any ideas why this happened, and is the reagent useless now?