I'm using Dionex Corona Ultra Charged Aerosol Detector and it's giving me a High Flow Ratio Error. Operating Manual is here: https://knowledge1.thermofisher.com/Chr ... ing_Manual

Page 7 contains the schematic.

The Flow Ratio is stuck at 3.87 (supposed to be 1.0). It never deviates from this, doesn't wobble, it just reads 3.87 all the time.

Troubleshooting says blockage in the detector, call tech support. This instrument is so old we can't call technical support, they're not helping. I'd like to try and clean it/ unblock it myself. Does anyone have experience with this.