I am having trouble taking aliquots using the 10 ml volumetric pipette.
After rinsing, I draw the solution up past the calibration mark and stopper the pipette with my index finger. Then I slowly rotate the pipette and try to let a tiny bit of air inside to get the meniscus down to the calibration mark. But every time, the solution just shoots down, or goes just below the calibration mark.
How can I improve my technique?