Disclosed is a method and apparatus for reducing communication system downtime when enabling cryptographic operation of a cryptographic system of the communication system where the cryptographic system includes a first cryptographic device operatively coupled to a plurality of second cryptographic devices via a communication network of the communication system. The method is particularly effective when the information to be communicated is digital data consisting of long patterns of \u201c1\u201ds or \u201c0\u201ds. The power cleaning head comprises two or more regions, wherein at least one of the regions is configured to move and wherein at least one of the regions comprises a squeegee element.