OUCH! those tangles are a nightmare aren't they?
A lot of people on the forum use litter such as finacard, megazorb or Aubiose, which seems to help on the non-tangling front.
As for bedding, I tear up tissue paper or kitchen towel. Often my LH boys come out of bed wearing what someone once referred to as 'hamster confetti' but it seems to fall out easily. Longer stranded paper bedding also seems to help more than the shorter cut pieces in my experience.
Hope that's of some help