Clicks occur in "low" position instead...

Question

Can't locate model #. Is a GE Profile 4-burner gas cooktop, k***s all on the right edge. 10 yrs old. Water got in at k**b hole when cleaning. Now the ignition clicking occurs for that one burner when it's in the wrong position. On "lite" gas flows but no clicking. On "low" the clicking occurs, but there's not enough gas to ignite I guess. Burner will light on "lite" if I turn any other burner on at the same time. #1 What needs to be replaced? #2 How do we get IN there? Does something have to be released or disconnected? Thank you so much.