In Nampo-dong, Daiso Busan Nampo (46 Gudeok-ro) is open until 10 pm, and Daiso

Busan Gukje Market (13 Junggu-ro) is close if you're at the market. The 안경 클리너 spray is 100ml, right at the 100ml carry-on limit, so it can fly in your 1L bag. It has 1.4K+ orders; spray, then wipe with a cloth.