What happens to hair and nail growth in space? Who does the hair cuts and what happens to the trimmings?

Question: What happens to hair and nail growth in space? Who does the hair cuts and what happens to the trimmings?
- Keywords:
  growth,
  hair,
  nail
Asked by L Middleton to Kevin, Katie, Julia, Jean-François, Floris, Delma, Claudie, Camilla on 4 Jan 2016.
- Delma Childers answered on 4 Jan 2016:
  
  Hair and nails grow normally in space, so you can imagine that during a year-long stay they’ll need to be trimmed a few times. This can be done with minimal mess by attaching a vacuum hose to clippers, as seen here:

Question: What happens to hair and nail growth in space? Who does the hair cuts and what happens to the trimmings?