Ugh — it’s mold. Some slices look OK, though, with smaller or no moldy bits. Are those safe to eat? Maybe they haven’t been touched by the mold yet, you think. The idea of eating them is ...

Turkey, tomato, and swiss on a bed of romaine lettuce sandwiched between two slices of sourdough. Classic. Oh no, what's this? Mold? But look, good new. The mold's only on part of the bread.

After opening the bag it comes in and using a couple of slices, I close the bag and squeeze out as much air as possible. But every time I open the bag a couple of days later, there’s mold ...

Unfortunately, mould on one slice is essentially mould on every slice (which is also the case for produce, by the way). It ...