Daiso Myeongdong Main Store (43 Myeongdong-gil) and Olive Young Myeongdong Town

(53 Myeongdong-gil) are a few steps apart on Myeongdong-gil, and still open after street food time. Olive Young's Wichik pocket sanitizer spray comes in 20ml x 2, small enough for the 100ml carry-on rule.