How to Clean a Dirty Bathtub

There are some products out there that claim to be able to clean grungy bathtubs.

It took me years to find one that really works. Take a look at the recent photos I took and see how well I get the job done! (This tub was covered in what looked like rust stains but I have also been successful in cleaning up the black grunge that also collects.)

Here's What I use