I've been using a glosser, but it makes my hair look greasy. How can get the shine without the greasy look?

Glossing or shine products should be used sparingly. The amount needed varies with the the thickness and texture of the hair. Try using a lightweight anti-frizz shine spray and hold the can about eight inches away from your hair when spraying. If you prefer a serum, start with a drop about the size of a dime. Apply it to the palm of your hand, rub hands together to distribute the product, then apply by smoothing hands over and through your hair. You can always add more if you need it.