1. gently squeeze the rubber stopper to stop the air out of the eyedropper. 2. dip in the solution that you want to suck. 3. gradually release the rubber stopper to yadut solution into the eyedropper. By absorbing the liquid quantity, comes closest to the volume that you want to use. 5. gently squeeze the rubber stopper to release the individual solution drips on a regular basis. Don't let the Eyedropper to touch at the end of the container edge and don't give too much higher than the container mouth.
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