Just mix white vinegar 50/50 with water and put it in a spray bottle. Stand in the shower and don't mess with your hair, just let the shower soak your hair really well. Then use the spray bottle to squirt vinegar all over your hair. You can also open the bottle and dump it on the top of your head. Let it sit for several minutes... you could finger comb your hair if you want, as that will distribute the vinegar through your hair (start at the ends and work up.) Rinse really well and then shampoo.