StatSensor Creatinine Meter AMR

Is anyone using the StatSensor Creatinine meter?  If so, how are you getting a specimen to run for your low end of the AMR?  When using the linearity kit from Nova Level 1 typically runs around 0.9-1.0 mg/dL for us, although the range is 0.5-1.40 mg/dL it never runs that low.  Is there another material you have been able to use to get a lower value?  Any help would be appreciated.

Thanks!