electrolyte

After a workout I will come home and I will start cramping up the muscles that I worked out that day. yes I've increased my water intake everyone always says I don't drink enough. not true I'm also following a strict macro diet where I get in all the nutrition I need. I just don't understand why...

I have been doing a lot of cardio and sweating a lot. Also using the sauna which my wife had put in the back. We sweat out a lot of toxins but also it gets me dehydrated where I need to drink something any recommendation of a good electrolyte mix drink I can do with water?