Teatree oil alone works great as a prevent, the fumes and such. Removing lice is easy! You can use a bottle of 70% isopropyl alchol, on your dreads, avoid your scalp! Tie them up and keep them under a shower cap for 30minutes, maybe an hour to be safe. Lice are capable of holding their breaths for up to 30 minutes, that's why a shower wont stop them, lice also take about a week to mature and begin laying more eggs, so after your first wash you should do one more, two even to be safe. Also, lice survive without a host for three days, beware of pillows, couches, hats, you know. If you've got them, they're easy to spot!