My Hamilton Beach Brew Station 47380/10 cup only brews 2-4 cups when I set it up for 10. There is a small filter in the dispenser but I have no manual to tell me whether to replace it or just cleanse it as part of the cleaning. I loved the way it made coffee prior to this issue. It had been working fine...what's up and what do I do about it? I haven't had it a year yet!