This conmemorative day is celebrated on this day because you wipe with your 10 fingers

Wipe: fuku. Fu: 2 in the hifumi number system, Ku: the way 9 is spelled in some counters. Wiping with your fingers: 10/29

If you use a wet towel to wipe your face, the microorganisms in your hands can get inside your eyes, so please be mindful of that!

Maybe, being in places like family restaurants and the such...

Using a wet towel to wipe my sword is not such a good idea!?