I have found that using a mixture of a cap full of bleach with the detergent and adding a cup of pine sol helps. As well as turning your water heater up a small amount. I would also highly recommend using anti fungal powder in between your toes after showering and throughout the day as needed, as a preventative.
Commonly cited reasons for washing new clothes, especially those worn next to the skin, are
to remove some of the chemicals added (for whatever reason) to the material by the manufacturer -- chemicals that your skin may have an adverse reaction to
to remove some of the pathogens that have been deposited on the garment by sick folk trying on the item in the ...