Last time I had my high pressure lines off I noticed that where these lines connect to the VP44 and the connector tubes there was some sort of crud built up on them. This is not the threaded part but the end of the tube that fits into the indention or bowl of the connector tube and VP44. Not sure what it is but I do know it is hard enough that you can not scratch it off with your finger. I am planning on pulling them loose and cleaning them, maybe it will help with the three lines that are constantly weeping. I was thinking about using an either emory cloth or steel wool, any other suggestions?