I came across this article at
www.food.com and have tried several of the remedies. They really are amazing! Our white grout seemed permanently orange and I tried the dawn detergent and vinegar solution and it is now white again! My clogged drain is draining well thanks to the vinegar and baking soda solution. Can't wait to try the many others in this article!
http://www.food.com/slideshow/20-must-see-diy-household-and-beauty-tips-73