for dispensing into a microfluidic chip, i would suggest the following:
- do not aspirate a leading air gap
- do not aspirate a transport/trailing air gap
- over-aspirate sample by 1-2 uL
- upon dispense, make sure 1-2 uL remains in the tip
- slow down dispense speed, acceleration, deceleration etc to keep dispense super slow e.g. 1 second to dispense
- use a longer delay after dispense
- add a 500-750 ms delay post dispense