hair pulling and hair eating before sleep!

[muddlepuddle1]

Hi,
My 2 year old daughter started chewing on her hair as a comfort before sleep. She ate a bit of hair (which we found in her nappy) so we cut her hair a bit shorter. Now she is unable to get it into her mouth and has started pulling bits out and eating them. This is definitely a comfort things as she only does it just before she falls asleep. Has anyone experience this? Any ideas on what we can do???
thanks!