In reply to jamface:
> (In reply to TwSpanner) I get mine from Awesome walls in Liverpool second hand at a £1 a pop, yes thats right, a pound each!
>
> ...are fine if you wash them to remove the chalky-rubbery build up.
Someone the other day mentioned putting them in the dishwasher, I'd never thought of that, so the next time it will be on a pot and pans cycle.
Friend of mine stripped his motorbike engine down, and put it in the dishwasher, no matter what he washed afterwards tasted oily. His standby dishwasher was not impressed!