Preventing contamination in pipetting is paramount to achieving reliable results. It requires identification of the potential contamination mechanisms in order that they can all be addressed. Aerosols, suspensions of solid or liquid particles in a gas, are formed in many laboratory activities such as pipetting with air displacement pipettes, and aerosols are the major contamination source in pipetting. They may transfer into the pipette body when unfiltered pipette tips are used and consequently contaminate subsequent samples. The cover story of this month titled: “Top 10 tips to avoid contamination in pipetting” contributed by Sartorius. As the story suggests Pipetting is one of the most common tasks performed in a laboratory on a daily basis. Studies show that more than 40 of lab professionals suffer from pipetting-caused disorders. In addition to causing discomfort to the user, the hand and arm injuries reduce the working ability and thus the accuracy, precision and reliability of the results.