Dilute the solution at a ratio of 1:4 with water (for very heavy scale buildup, a stronger concentration may be used).

• Kettle: Fill with 600 ml of water and boil. Turn off the kettle. Add 200 ml of the product and wait until the foaming/reaction stops. Repeat if necessary. Then boil with clean water and rinse thoroughly.
• Shower Head: Place in the diluted solution until the scale dissolves, then rinse thoroughly.
• Steam Iron: Unplug the appliance. Pour the diluted solution into the tank, wait 30 minutes, release the solution using the spray button, then rinse thoroughly.

Do not leave the solution inside the appliance for more than 8 hours.