My filters didn't come with a priming washer for some reason.
Not priming it correctly probably is the problem.
I wasn't too concerned about not having a priming washer because during a shtf situation, there probably wouldn't be water pressure anyway. I'll use a water bottle and squirt water into the filters and see if that works.
But I'll call and ask for a priming washer too just to play it safe.
Thanks so much for your time guys,