By Gemma Strong A savvy woman has shared her surprising hack for keeping bananas fresh for up to 26 days. Bananas are a staple in most kitchens as a quick and healthy snack. But as fans know, they can ripen in an instant and quickly turn brown and mushy. While there is storage advice available to help keep them at their best, this latest trick preserves them for almost a month – and it really couldn’t be simpler. Taking to her TikTok account, Amy Cross – @amycrosslegacy \- shared her clever jar tip to keep bananas “fresh longer”. She chopped up a banana, leaving its skin on, before leaving it …