While it might seem logical to put paper towels in the paper recycling bin since they are made from paper, it's not recommended. Paper towels, napkins, and tissues are often contaminated with food, grease, or bodily fluids, which makes them unsuitable for recycling. The recycling process aims to clean and reprocess materials, and contamination can disrupt this process. Additionally, paper towels are typically made from already recycled paper fibers, which are too short to be recycled again. Therefore, it's best to compost used paper towels or dispose of them in your regular trash bin.