Turbine Gas detector detects dust instead of gases most of the time

Hello guys
In our Siemens turbine, and as an instrument technician I’m facing a problem with infrared gas detectors installed in each turbine,
The thing is these GD10 Infrared detector keep showing LEL gas detection each time, and after every intervention I found that it caused by DUST and outer environment particularly sandstorms,
Thus we as technicians perform weekly cleaning to eliminate these alarms!!
So it appeared that these detectors, detects sand insrtead of gases :thinking::thinking:
So is there a solution for example to avoid this phenomenon? Or to lower the rate of intervention on these instruments ?