I clean mine out when ever we buy groceries. Nothing new goes in until we sort any food already in there. The most common offender is my husband and that sandwich, salad , pick your vice that he planned on eating later but never did.
Yeah we clean ours out every tue nite. trash day at 8am wed. I tossed some produce and yogurt that his truly wouldn't chop up and eat etc. I should weed the garden when I get home but I suspect I will read instead.