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All it takes is a chip; and like an app, there's "a chip" for that. A central China laundry service, has started adding microchips to the sheets, towels and quilts, in hotels, in an effort to make hotel guests feel easier and more confident when staying in hotels. This is a possibility, that this may become a standard in your home too. Something less to have to put on a list? Details about this new innovation can be found here. CNN's Rob Pichela, July 10, 2019: Chinese City Introduces Hotel Sheets That Tell You When They Were Last Washed