How do nits bite?

basically one of my daughter found 2 head lice in her hair. and didn't think to tell me, so I didn't realise , and she's 13 yeard old , she got looking on websites how to get rid of them herself, so she used mayonnaise to kill all lice and then after 5-6 hours wash the mayonnaise out then shampoo several times, clever girl , and brushed all the dead lice out < works 101%