Towels should be washed at least once per week.
It's best to swap your towels at least once per week or at least wash the towels once per week unless you want too do so more.
If you have more than one person using the towels it's best to keep a fresh towel in the bathroom for everyone.
Towels absorb a lot of water and remain damp for hours, which is the perfect breeding ground for unwanted germs.
That's why towels should be washed every three uses.
You have 19 million skin cells and 650 sweat glands in every inch of your body.
And one powerful tool keeps it all clean day after day: your bath towel.
Ultimately, though, when a towel's threads begin to pull—or you notice a lingering odor, despite a careful wash—it's time to toss it; you can expect body and hand towels to last between two to five years depending on their quality. Wash cloths, on the other hand, should be replaced every one or two years.
Most of the times, we leave towels in dark bathrooms where they could be exposed to disease-causing bacteria.
In a study, Charles Gerba, microbiologist, University of Arizona, found 90 per cent of bathroom towels to have been contaminated with coliform bacteria while 14 per cent of them were found to carry E coli.
I change my towels at least once per week and I always have a fresh new towel available for everyone who showers although it's okay to use the same towel I don't like using the same towel that someone else used after I shower.