My coffee’s tasting thin and sour! Help.Updated 3 years ago

Thin and sour by and large = under-extraction. One first thing to check is your water temperature — water that's not hot enough will result in a more sour cup. If you use a programmable electric kettle, I'd keep it set at 203°F. If you use the stove, I'd just be sure to start brewing a little closer off boil (like 1 minute, max). 

The next step is grinding a little finer, and another step would be to do a little less water-to-coffee. We do recommend a 16-to-1 water-to-coffee ratio. 

I'm hoping you'll get it tasting creamy, round and smooth! Let us know how it goes.