Kitchen towels used with raw meat, greasy pans, or messy spills should be washed separately because they can carry heavier contamination.
These contaminants may transfer to other fabrics during a normal laundry cycle.
Bathroom hand towels and bath towels can usually be washed together without problems.
However, kitchen towels should be sorted based on their actual use rather than simply their appearance.
A practical routine is to separate heavily dirty kitchen towels, wash regular towels with quality detergent, avoid overcrowding the machine, and make sure every towel dries completely before storing.
The goal is not perfect laundry separation—it is preventing contamination, reducing odors, and keeping towels fresh enough to safely use every day.