By Zahna Eklund Say goodbye to soggy chips \- a game-changing hack means you’ll always have crispy leftovers. If you’ve ever ordered chips with your takeaway and not been able to finish them all, then you probably know how miserable it can be to eat them when they’ve gone cold. Chips also don’t take well to being microwaved as they end up in a soggy mess that doesn’t hold any of the crisp and crunch they had when they were fresh. But according to one food expert, there’s another appliance you can use to guarantee crispy leftovers every time, and it’s something you probably already own after th…