- Fill the kettle with water up to three-quarters of the maximum level and bring the water to the boil.
 - After the kettle has switched off, add white vinegar (8% acetic acid) to the maximum level.
 - Leave the solution in the kettle overnight.
 - Empty the kettle and rinse the inside thoroughly.
 - Fill the kettle with fresh water and boil the water.
 - Empty the kettle and rinse it with fresh water again.
 - Repeat the procedure if there is still some scale in the kettle.
 
Note:
- Regular descaling prolongs the life of your kettle.
 - Never use natural vinegar or white vinegar with an acetic acid content higher than 8%, as this may damage the inside of your Philips kettle.