Ideally you want to switch socks twice a week for the most effective nitrate reduction. BRS did a good study on the effectiveness compared to change schedule. Every day compared to twice a week are barely any different. But Going more than a week between changes is also almost worthless. The idea is to remove the organics before they get a chance to dissolve. Buy a set of four or eight socks and swap them every Saturday and Wednesday or something. When you’re down to the last one, turn them all inside out and toss in the washer, heavy duty, hot water, little fit of bleach if you’re comfortable with that, and then repeat the cycle.