Where better to learn hidden tips and tricks than on social media? Here are some of our favorite food hacks that we can’t stop obsessing about, thanks to Instagram: Spray coconut oil on top of a cut avocado to keep it from browning. Yes, really! This one really blew our minds: Wrap the top of your bunch of bananas with plastic wrap to make them last four to five days longer. Unscented dental floss works better than a knife for cutting through things like soft cakes and cheeses.