…is your beach towel a bacteria bomb that needs washing every day? No! Dr. Mehmet Oz says it’s OK to use the same towel for several days running – IF you hang it in direct sunlight to dry. The sun’s UV rays will kill 90% of the germs, leaving bacteria levels too low to make you sick. But, if the towel’s still damp the next day – toss it in the dryer. Because with moisture, bacteria can multiply 100-fold after each use.