just don't accept the bike with poo on it.
if it hasn't been noticed when the bike comes in we phone the customer and tell them that we will be charging £15 for it. if they don't like that come and pick it up.
poo contaminated bikes always seem to be morning bikes aswel which means the thought/smell/stigma sticks with you for the rest of the day, like CK said you end up thinking it's still on you for ages after. :x
but there is nothing more funny when it happens to someonelse!!
then the chasing around the shop like playtime at school happens with "the lurghi hand"