I am having a carryover issue with one of my instruments. I have a 4552 autosampler hooked up to a 4660 eclipse to a 6890/5973 gc/ms. I am having massive alcohol carryover in my waters and soils. I have changed all the sample lines, replaced 26ml syringe/plunger, water sample needle, burket valves/manifold on front side, pencil traps, column, weldment, etc. These carry just does not seem to go away. any ideas?