Unfortunately, dish towels can easily spread germs and be a source of cross-contamination in your kitchen. Thankfully, however, this problem can be easily remedied with the help of a washing machine. If you're using your towels to wipe up heavy spills or soak up liquid from raw meat, wash them after every use. If you're using them to tidy up around the kitchen, wash them every day. If you're only using them to dry your hands or to brush off extra flour or dust every once in a while, wash them every few days.