Is the hotel clean only by changing the quilt cover and not the quilt core?

The hotel only changes the quilt cover instead of the quilt core, which is not clean. Although the quilt cover is changed and clean, but the quilt covered inside is not clean, it will produce mold. If you don't treat the quilt and put on a clean quilt cover, the quilt cover will still absorb the bacteria on the quilt. You must let the quilt cool in it for at least two hours. Make the ultraviolet rays of the sun completely kill the mold in the quilt, and play the role of disinfection and sterilization. You can't change the quilt cover without changing it.