Homemade shampoo leaves hair soapy?

I recently made my own shampoo. It consists of tea, glycerin and soap flakes. I have really oily hair and I noticed my hair isn't as lively as it usually was. It also feels a little soapy. Am I using too much? I try to rinse it well but it just doesn't seem to get back to where it was when I used store bought shampoo. Any thoughts?