This descaler is the one and only for your steam iron. Our descaler not only removes deposits and dissolves limestone from your steam iron. Thanks to the special formula it even optimizes the operation of the steam iron and extends its lifespan.Do not use on, marble or galvanized/enabeled surfaces. HOW TO USEMake sure the appliance is disconnected from the mains power. 1. Set the steam iron to “no steam”. 2. Fill the container with 2/3 water and 1/3 descaler. 3. Set to steam mode and heat the steam iron in a vertical position, when it is hot, disconnect the power plug from the socket. 4. Let it cooldown (and let the descaler take effect) for 1 to 2 hours. 5. Empty the container and rinse it several times. 6. Lastly fill the container with water, heat the steam iron and use the steam button several times. Clean the plate thoroughly before ironing. The distributor is not liable for any damages or losses resulting from improper use of the descaler. Expiration date: 5 years from the date of manufacture indicated on the package.