Dometic stove, one burner not working

I had the same problem while the RV was under warranty and the dealer replaced the entire stove, propane tank, and propane regulator just about a year ago.. The smaller burner on my two burner propane Dometic stove won't light. It's sparking but not getting any propane. Before it completely wouldn't start, for two days I'd see an on-and-on flame but it wouldn't stay lit. I removed the top two pieces and found a pool of water so cleaned that out. I'm wondering if I just need to clean the jet (with a safety pin? I remember being told to never do that on other propane appliances so I'm hesitant to try that here) or if there's anything else I can try.