feet

Washing the feet for the second time after having a shower

Q: Whenever I have a shower and after I wash my feet and step out to dry myself and dress myself then when I go back to wipe the base of the shower cubicle where you stand, I find there are small hairs and little fluff. Does this mean I have to wash my feet again and the areas I've stepped on? Or are these hairs pure and I can just ignore it?