FAO SlinkyToy

i have a cleaning question or 6...
Radar, the lovely Angora wether, is due for fall shearing
this week (as soon as i get his polarfleece coat finished...
can't have the poor thing freezing). anyway, being his typical
obnoxious goaty self, he's got hay & such in his hair. do i
try to wash & comb him out before shearing (he had a bath a
few weeks after he was neutered & boy did that improve his
appearance & smellg)? or do i have to hand pick a couple
pounds of mohair? before or after i wash it? on the off chance
he may have picked up lice while on pasture, how does one
remove the remains without destroying the fiber?
TIA. i ruined his kid cut
lee