Only citric acid-based descalers are suitable for descaling the SENSEO machine. This type of descaler descales the machine without damaging it.
Philips has developed a special descaler for SENSEO machines: HD7012 and HD7011.
The special descaler can be bought on the Online shop or your retailer.
Note: Never use a descaling agent based on mineral acids such as sulfuric acid, hydrochloric acid, sulfamic acid and acetic acid (e.g. vinegar). These descaling agents may damage your SENSEO coffee machine.