I preheated my cooler too long and when I added my strike water to the grain the temperature jumped to 198 degrees. The strike water was only 165 degrees. It took my about a half hour of adding ice, some cold water and stirring but I am now down to 169 and I will keep the lid open till it gets down to 156. Is this beer ruined? I tasted the mash and it tasted pretty sugary. Please advise.
I just used hot water from the sink. I believe it was about 185 - 190 and I closed the lid for probably a half hour. This is the second time I mashed and the first time I didn't preheat and was only able to get up to 142.