We, at Mme L’Ovary, are offering an amazing pre-wash care product for your period undies. Our special pre-wash detergent is just what you need to make sure your monthly undies last their longest. Here's how to use our special detergent. Start by dissolving a capsule in a sink or basin full of warm water. Next, soak your undies in there for about ten minutes.. Our capsules are biodegradable, the packaging is 100% compostable, and they contain tea tree essential oil. The secret with this oil is that it has antibacterial properties, so it's perfect for giving your undies a vigorous prewash. They're basically among the best detergents for prewashing any of your underclothes. Having said that, they're an optional product, ideal for anyone who wants to give their undies a long life full of gentle washes.