Catch the flowing hair and debris! I found a goods called "Washbasin Garbage Guard" at Daiso, a 100-yen shop, and bought it.
Goods that are set in the drain of the washbasin to prevent hair and dust from flowing away. Made of coarse polyurethane, it can be installed in both rubber stopper and pop-up drains. The approximate size is 4 cm in diameter x 5 mm in thickness. If the diameter of the drain outlet is small, it can be cut and adjusted.
When I used it on my wash basin at home, it caught my hair and soap scum firmly, which made it easier to clean the drain. If you continue to use it, it will be easier to keep the drainage pipe clean. There is also a neck that makes it difficult for water to flow when dust collects on the dust guard. Ideally, dust should be removed and replaced with new ones frequently.
The price is 108 yen (tax included) for 18 pieces per bag. It also helps prevent the outflow of contact lenses, so why not feel free to use it?