A clean towel is not always as clean as it appears, and kitchen towels and bath towels are not exposed to the same types of dirt. Kitchen towels often come into contact with food particles, grease, and bacteria, while bath towels mainly absorb water and skin cells after bathing. Because they serve different purposes, the way they should be washed depends largely on how they have been used.
Kitchen towels that have only been used to dry clean hands or freshly washed dishes can usually be washed together with bath towels without causing problems. A quality detergent, warm water, and leaving enough space in the washing machine for proper agitation help ensure that both types of towels are cleaned effectively. Thorough drying is equally important, as damp towels can develop unpleasant odors and encourage the growth of microorganisms.
The situation is different when kitchen towels have been used to wipe up raw meat juices, greasy pans, or large food spills. These towels are more heavily contaminated and are generally better washed separately or on a more intensive cycle, following the care instructions on the label. Doing so helps prevent grease, food residue, and bacteria from transferring to cleaner towels.
Instead of worrying about separating every towel, it is more useful to follow a simple and consistent laundry routine. Wash heavily soiled towels on their own, clean the rest with the appropriate settings, and always dry them completely before storing them. If a towel still smells musty or feels dirty after a proper wash, it has likely reached the end of its useful life and should be replaced.