i no this is old but dip them in that lemon juice
- Chew gum instead of biting them
- Every time you are biting them think about how many germs are being put into your mouth or about how ugly they look, etc.
Try putting cream a round your nails
you could also buy that nail varnish stuff that tastes horrible you put that on and it stops you biting them! it really helped me I haven't bitten my nails in 5 years !!
every time you bite them think thet there are more germs under your nails than on a public toilet seat! It is really true!!