Greasy hair

I don't know if this is appropriate for the website but I'm going to ask anyways. Does anyone know how to get rid of greasy hair. I've never had a problem with it. I could go two three days without washing it. For about a month or two my hair is always greasy. I always wash it every day for about a couple years now, and my hair looks greasy. I switched shampoo thought it would help but it didn't. Soon as my hair dries it looks greasy. I rise it out to where my hair doesn't feel soft but I can't seem to figure out yhe problem . I've also stopped using shampoo and conditioner and somehow my hair still looks geasy. Please help I'm getting so frustrated! 😡