My bathtub does not have a shiney, smooth, porcelain surface, it has a more matte finish and it was a horror to clean. I would have to spray it, wait to let it soak in, then use a scrub brush or brillo with all my might, and still had a hard time getting off the dirt. I have tried many different products. I also could never get my shower doors completely clear of soap scum. A friend recommended Mr. Clean Disinfecting Bath Cleaner with Febreze and I could not believe it. I just sprayed it on and all of the dirt and soap scum came right off. I thought I was seeing things, how could this product get the dirt off so easily that I had spend the passed six years struggling to clean. I have told everyone I know about it, I even posted it on facebook so more friends could know. Thank you so much for this product. Anything to make our lives just that much easier is a blessing. I can not say enough praise about it.