[Winegrower]

Seems like a logical thread to utilize.  We currently have a small leak on the cold side of one of the bathroom sinks when the valve is cracked open.  There is no visible set screw holding the handle on and moderate application of force does not dislodge the handle to expose the lower portion of the valve.  Advice would be appreciated.  After a month's wait on Grohe thought I'd bother my guru friends.  Here's a photo of the valve in question.