I bought this product because I wanted to ensure my washing machine was as hygienic as possible. But after using it, a terrible smell developed in my machine which I've never experienced before. It took a number of hot water washes to get rid of the odour. Suffice to say, I feel like I've wasted my money and I won't be purchasing this product again. I've also since read other negative reviews on the internet of people with similar experiences. Buyer beware.