What always comes, but never truly arrives?

I have long hair but never need to comb it. I help you clean without getting dirty myself. What am I? Solve the riddle → I clean floors and get dirty as I make things clean. What am I? Solve the riddle → I have a shell but no head. You can boil me or bake me in a cake. What am I? Solve the riddle → You can catch me, but not throw me. I can make you sneeze and cough, but I have no hands or feet. What am I? Solve the riddle → I have many teeth but cannot bite. I hold your jacket tightly together. I can go up and down. What am I? Solve the riddle →