Carefully release liquid from the pipet until the bottom of the meniscus is on the calibration line.
Release your finger and allow the liquid in the pipet to drain into a beaker or flask. Touch the tip of the pipet to the side of the beaker or flask to completely drain the pipet.
Using a Buret
Clean the buret with a buret brush, water, and a small amount of detergent. Rinse it twice with deionized water. Be sure to drain deionized water through the tip.
Rinse the buret again with two 10 mL portions of the titrant (EDTA in this experiment).
Fill the buret with titrant and drain a small amount from the buret to dispel any air bubbles that might be in the tip.
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