STEP 1: Remove serum dropper from bottle.
STEP 2: With a sharp-tipped object, carefully pull the plastic stopper out of the neck of the bottle. A knife or a pair of tweezers work best. Be sure to remove the stopper fully
STEP 3: Insert and screw on serum pump until tight.
STEP 4: Prime pump until product dispenses.
STEP 5: Replace cap after use.