Area being treated needs to be dry.
I have been trying for the 5 yrs we have lived in this house to get the hard water stains out of the toilet with no success. Your product helped more than anything but they are not totally gone. I figure another couple of applications and maybe they will be gone. I think the previous owner just never cleaned like she should have to allow things to be as bad as they were. Thumbs up to your product.
Rating: 4 stars