I recently went off to college and I can not seem to get my hair clean at all no matter how many times I wash it. It’s super greasy in the back and just keeps spreading. I googled the problem and I think it may have something to do with the hardness of the shower water. Has this happened to anyone else and does anyone have any recommendations of what to do? I saw that using a clarifying shampoo once a week may help, but I’m not sure what brand to use.