I am using GCMS 8890 with a 7010B TQ system. We ran a blank and we're seeing a ghost peak and a baseline that we're unsure about. Most of the baseline is m/z 44 except for the weird "peak" which can be seen in the image below. There was no injection (the column was blank). We baked the column and that didn't help. It is a new column, Restek-200ms. The 7010B/8890 has a 1 mL/min flow and the oven temperature ramps 35-250 deg. C (column max of 320 deg. C). Gas filter is clean and we're using Ultra High Purity Helium. The Autotune/air-water checks are totally normal. And no leaks are detected.