one exception to MarkS’ ruleis the ready salted crips, liberally sprinkled with malt vinegar. My Mum showed me this little trick when I was a kid and it’s fantastic, the crisps go ever so slightly soggy, and best of all, there’s a little puddle of salty vinegar in the bottom of the packet with lovely little bits of crisp floating in it. In fact I heard the other day that this practice was what spurred the crisp manufacturers to make salt ‘n’ vinegar packets