u should wash them in very hot water and spray it with the lice bedding spray but i normally wash mine twice
Well, if it were me, I would get new linen, the lice could be living in the old. also, sad to say, there me be some in the bed itself, and as to that, aside from getting a new bed, I am not sure unless there is a way to "steam clean" the mattress. As to washing and drying on high heat, that might not be a bad idea.
Sorry I can not be of more help. Good luck.