The best technique for pipetting any viscous/foaming liquid is the Reverse Pipetting technique. To start with, set the desired volume and depress the plunger till the SECOND step. Immerse the tip inside the liquid and slowly release the plunger. Depress the plunger till the FIRST step only to get the desired volume. The residual (blow-out) volume is discarded. For different pipetting technique, please refer to the instruction manual.