Sanitizing without washing?

Hello all! I am in the process of redoing my wardrobe and upgrading to sustainable, true high quality pieces. I have these beautiful organic cotton leggings that i want to wear out, but i also want to wear them as much as possible afterwards before rewashing (i wash once a week). I’d hate to wash them after one wear again and again when they can be reworn before a rewash. Does anyone have any tips on how to safely sanitize organic cotton clothing (and linen) without messing with the fabric or washing? Thank you :)