Would appreciate any advice. I am experiencing periodic air peaks occuring during runs on my 7890B/5975 system (see TIC image below). I have done a complete inlet maintenance, removed and re-installed the column, and checked the autotune and I still am experiencing this issue. The images below are from a MeOH injection using a DB-Wax column and normal temp ramp. All of the peaks have identical MS spectra as shown below. I'm currently at a loss on how to troubleshoot this as the MS itself looks perfectly normal with the autotube and air/water check.
