I literally tried every product I could find and even tried home remedies to try to remove the soap scum off of my shower doors. NOTHING would get that scum off! A while back I saw reviews for Shower Power online and decided to order it online. The website only has two-packs or bigger available so I was hoping it was going to be an effective cleaner since I had two bottles on the way. This cleaner is definitely effective! I was finally able to get the soap scum off of my glass shower doors. I have no idea what is in this product that sets it apart from other cleaners. I just know it was the first product to actually get rid of the soap scum off my shower doors. I sprayed my shower doors and let it sit for about 10 minutes. I then got scrub sponge and began scrubbing the doors. It didn't even take much scrubbing! The soap scum came right off without much effort. My shower doors look SO much better now. I am so glad I ordered this product. I HIGHLY recommend it. Scent There is a pretty strong chemical scent.