My friends from a farm gave me some clarified butter, about half a liter in a plastic container. I used it for some time, mostly for frying. A couple of days ago I saw mold spots at the bottom of the container. Obviously, this means that butter was not clarified properly and some non-fat components remained at the bottom.
What should I do with the butter? Is it unsafe? Or I am ok to use it if I don't touch a bottom level? Can I transfer untouched butter to another container?