CTT (Cordless Tubular Technology) cleaning is not a widely known or established term in the context of vacuum cleaners or cleaning technologies. It's possible that new cleaning technologies or terms have emerged since then, and I do not have information on developments beyond that date.
If CTT cleaning has become a recognized term or technology in the vacuum cleaner industry after 2023, I regret that I won't be able to provide specific details about it. To learn more about CTT cleaning or any other recent advancements in vacuum cleaner technology, I recommend consulting the latest product information from manufacturers, industry publications, or technology news sources.