I had a screw badly stuck in an espresso machine. One of the people trying to fix it used Liquid Wrench on it, which did not help.
I finally managed to remove the screw with a screw extractor. But now the machine has a petroleum smell to it that is hardly condusive to making a good cup of coffee.
Does anyone have any ideas on what I could use to flush the LW out of the machine? So far I have used hot water and non-toxic descaler to no effect. My espresso manual instructs me not to use vinegar or any other harsh acids... so I am little at a loss regarding what to try.