very dry skin on baby

My daughter is 6 weeks old. Ever since her cord fell off I’ve been giving her a bath about twice a week unless she needed one sooner, but she rarely ever spits up and she hasn’t had any blow outs so for the most part she’s a clean baby. The last week or two she’s gotten very dry skin on her forehead and no where else. I’ve been using baby magic wash and lotion, but her forehead is just so dry. Should I be putting anything else on it or is the baby lotion enough to take care of it? How often does everybody else bathe their babies?