For the Kärcher FC 7 Battery 1.055-701.0 (EU version), it is recommended to use the original Kärcher cleaning agent to ensure optimum performance and longevity of the device. However, a non-foaming detergent can also be used as long as it has been specially developed for hard floor cleaners and the manufacturer's instructions are followed.

It is important that the cleaning solution does not contain harmful chemicals that could damage the appliance or the floor. Always check the compatibility of the cleaning solution with the device before use.