I'm confused too Ian .... I took what I assume to be the MAF sensor (top of the air intake, engine side of the filter, 3 small bolts holding it in, about 4 inches by 3) out last night and could see no wires or anything that could be cleaned!
It has 2 errr 'posts' that stick into the airflow, but what either of them do is a mystery. I didnt want to poke them around too much just in case, so anyone that knows how they work on an LS400 Mk2, please enlighten me (and anyone else).
Cheers
Dave