Set the solder pot temperature knob to "off". But seriously, you can greatly reduce dross formation by inerting with nitrogen, but I don't know of any methods to totally eliminate dross. Greg Kilinski Acuson Corp. [log in to unmask] ______________________________ Reply Separator _________________________________ Subject: assy: Dross elimination Author: [log in to unmask] at ccUnix Date: 8/14/96 02:35 PM Hello TechNetter! Question for all the wave solder folks. Have any of you found a way to totally eliminate dross from your wave solder machines?