What should I use to wash away the mildew on the hotel chair cover?

Soak the moldy place of duvets in rice washing water for one night, so that the residual protein can adsorb the mold. The next day, the color of the rice washing water deepened and the mildew spots were removed. For places where mildew spots are still stubborn, you can apply some 5% alcohol solution, or scrub them repeatedly with hot soapy water for several times, and then rub them as usual, and the mildew spots can be completely removed.