Question: How often should I wash my bath towel? I mean, how dirty is it if it only dries a clean person?
Answer: After three uses, if dried completely.
A microbiologist from the New York University School of Medicine found that our bath towels are a breeding ground for bacteria, the moment we first use them to dry ourselves. If the towel stays wet, the bacteria continue to breed rapidly because bacteria loves warm, wet environments. Allowing the towel to dry between uses does extend time between washes, but should be washed every three uses.
And if it smells? Definitely overdue for a wash. Read about disinfecting smelly laundry or laundry post-illness here.