Question about syringe filters

How often do you guys change out your syringe filters and how do you wash the tops do you soak them and then reuse them or do you put different syringe filters in it. I was struggling with contamination for so long only to realize that it didn't matter if I soak them in bleach or not my grain was still getting contaminated so now I'm just changing him out every time I empty the jar but I'm curious what others do.

How often do you guys change out your syringe filters and how do you wash the tops do you soak them and then reuse them or do you put different syringe filters in it. I was struggling with contamination for so long only to realize that it didn't matter if I soak them in bleach or not my grain was still getting contaminated so now I'm just changing him out every time I empty the jar but I'm curious what others do.