I was in the same boat.. half cup brewing. I used paper clips (very helpful) I read to put the whole machine in the sink and use your pressure hose over the water reservoir for 30 seconds to flush the system which im sure helped clean the lines but caused the water to not siphon. I was one step away from either tearing it apart or throwing it in the garbage when I tipped the whole machine upside down and shook it. IT WORKS PERFECTLY NOW! coincidence? no clue but hey, it works. figured I'd share for all those who are at wits end like I was.