With a 1:100 product/water dilution ratio, this Washing Machine Cleaner kills 99% of the above mentioned bacteria and other pathogens in 20 minutes. It works by penetrating, dissolving and eliminating residue, mold and bacteria to prevent them from causing laundry problems down the road. Say goodbye to invisible germs on your freshly cleaned clothes! OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.