Eggs that have gone way past their expiration date in the fridge can be composted. But if you’re going to toss whole eggs into the compost bin, make sure to crack them open and stir them around with other organic matter. When whole eggs are put into the compost, the natural heat can “cook” the eggs and create gas inside. Eventually, the buildup becomes too much, and they can explode. It’s not dangerous, it’s just very smelly. And don’t give your pets old eggs to eat; if it’s unsafe for you, it’s unsafe for them.

If you have some milk in the fridge that’s spoiled or its freshness is questionable, don’t pour it down the drain. The great thing about milk is that it’s loaded with nutrients like calcium, protein, vitamin B and natural sugars that are also good for plants. Use old milk as an all-natural fertilizer by pouring it around the base of plants in the garden to give them a nutritional boost. The micro-organisms in the soil will love it, too, which helps to improve the overall health of the soil.

Some of the toughest stuff to clean in the kitchen is all the baked-on grime inside your oven. Instead of reaching for chemical oven cleaner, try this all-natural alternative instead. Mix baking soda with some water until you get a pastelike consistency. Spread the mixture all over the inside of the oven. Wait at least 12 hours, then fill a spray bottle with white vinegar and liberally spray the inside. The baking soda and vinegar together will cause a foaming reaction, which will bubble away the baked-on mess. Wipe and rinse with a little water, and voila! Clean oven.