Been there poor and parents drilling me to not waste food. At 49 I do it to this day. I've eaten alot of stuff people would say it too old or left out too long. I just figured it trained my stomach to be so tough all these years. I've been thereCheese is mold. And if you've ever gone hungry, you learned not to waste food. There is nothing wrong with cutting off bad parts of food so the rest can be salvaged, your mom is smart