What is the Best Way to cut open my old Fuel Filter?

So i can see what was Inside?



I changed the Fuel Filter, and i think the car is running Better.



Also, should i Continue to add %26quot;3 Cans fo SeaFoam%26quot; Every 2nd Fill-up? Thanks!
What is the Best Way to cut open my old Fuel Filter?
if your gonna seafoam, do it 1 can every 3000 miles