I don’t know what is supposed to be wrong with washing hankies, but simply put, I like to use hankie on the go only to wipe down front drip to look clean, and spit out back drip wherever and whenever I can. When I’m home I like to use tissues, Kleenex, paper towels, napkins whatever I want and then I can use that for front drip, spitting back drip, or even deep cleaning my nostrils. Hankies are just only convenient when outside imho.