Posted: 10/09/2014 at 12:13
Supermarket cobs are usually vacuum-packed. Sweetcorn kernels, just like peas convert from sugar to starch the moment you pick them. That's why growers are encouraged to put the water on to boil before they go to pick the cobs, and then run back with them to the kitchen.
They certainly won't keep in good condition in the fridge for even a day.
Before microwaving sweetcorn for eating I usually peel back, but not remove the leaves, remove the silk and innermost leaves and re-wrap with one layer of leaves. Then microwave singly or up to three at a time. Slather with butter and salt well.