Answer:
I am milky white and scares people.
My first is high my second damp my whole a tie a writer's cramp.
I run up and down the stairs without moving. What am I?
I drift forever with the current and flows to your everyday life. I make living easy but I am good at killing people too.
If you lose me, you may cause people around you to lose me too. What am I?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?