While GreaseMaster has a number of automotive and enthusiast-related uses, like oil and grease stains in clothing, it works wonders in household chores and is a true multipurpose cleaner. Here I, again, used it at 400:1 to remove mildew on a textured vinyl shower curtain. Click image to enlarge.
After playing around with it some, I ended up spraying it on and letting it sit for 1-2 minutes then scrubbing a brush, which was helpful on this surface because of the slight texture on the vinyl shower curtain. But just like that, a quick rinse with water and the mildew was gone. I did try this test previously with a paper towel and found that it worked almost as well. Due to the texture, however, I found the brush was a better solution. Click image to enlarge.