When was the last time you ate Jell-O and why? Jell-O sales have slipped 19 percent in the past four years. Recent food fads like Greek yogurt have sliced into its market share, which also points to Jell-O’s decidedly unnatural image as a reason for why people aren’t reaching for it as much on store shelves nationwide. We still love Jell-O for a fun treat. When was the last time you ate Jell-O? Tell us here and 6:45 Monday morning.