Left MMS in car with direct sunlight and heat

My understanding is that the 2 bottles should be stored in the dark in glass bottles. Before I new that, I brought the 2 bottles with me to work, I forget them in my car on my front seat and were exposed to direct sunlight and heat. Since then, the MMS has been a lot stronger tasting (harsh) and more of a burn on the throat going down but still effective in treating symptoms. Once exposed to direct sunlight and heat, is it still good? Can it go bad or spoil?

-Thank you