I agree with the Wild Child recommendation, you can get it at Woollies?Safeway, they have a single dose treatment and a comb through treatment, I'd be buying both, using the single dose now and then follow up with the comb through. Their comb (comes with the treatment) is the best out of all the combs on the market IMO.

I have *never* used a chemical treatment on my DD. Really careful sectioning and combing is the secret to getting rid of the blighters. You may need to get someone else to comb for you. Good luck.