Nozzles that are always frustrating on vacuum cleaner slugs. Either the quality of plastic, or our people exploit them in this way, or they bought such a special (cheaper) - it is not known, but these pads are eternally killed (they constantly flatten at the end and are not very high-quality and it is not convenient to clean the interior with such a nozzle). And so a self-service car wash is like a self-service car wash. For the record, it is forbidden to wash the engine in this sink.