Before initial and each subsequent use, inspect your gas detector for any faults or broken pieces. If anything looks unusual do not use the device before consulting a professional or having the device repaired.
Cleaning
Only clean the device by wiping with a soft damp cloth. Do not submerge the detector or use abrasive cleaners.
Maintenance
Changing the batteries
There should be a low battery indicator on your gas detector. When this is activated, change the batteries immediately.
Sensor calibration
Most gas detectors are self calibrating and will do this automatically when switched on. For some models it is possible to replace the sensor, but you will need to consult the instructions and contact the manufacturer for details.
Storage
Gas detectors should be stored in a dry location. If storing for a prolonged period, remove the batteries to prevent drainage.