The sink garbage disposal can make post-dinner cleanup a breeze. Although it can handle plenty of food scraps, there are some everyday items that can ruin your garbage disposal. Here are 14 everyday items that you should never put in the garbage disposal. Make sure to peel those off and toss them in the trash before discarding any food scraps in the garbage disposal. Potato peelsSimilarly, the starch from potato peels can swell and get gummy in your garbage disposal, causing issues down the line.