When you wash at temperatures below 60°C, bacteria can survive and can be transmitted between garments in the wash. Dettol antibacterial laundry sanitiser is an additive that kills 99.9% of bacteria, even below 30°C . You can be confident that your laundry is hygienically clean every time, whatever temperature you wash at (proven to work in rinse cycle temperatures as low as 15°C). Just add it to your normal washing routine after adding your detergent.