Help with grandson and his mother-Iowa

Location: iowa my grandson, 16, has become a problem. He is mentally abusing his mother, she said no physical stuff. He refuses to go to school, calls his mom bad names and refuses to clean up after himself. She has talked to his counselors but they are no help, they just say “you are his safe place”. He was in a group home a year or two ago and that seemed to help. Now it’s even worse. His dad is not really on the picture much and does not help at all. She has her own health problems. Is there anything she can do?