What To Do If The Dropper Bottle Cannot Be Opened

1. When using the dropper, pinch the rubber nipple with your fingers to drive out the air in the dropper, then insert the dropper into the reagent bottle, release your finger, and the reagent will be inhaled.

2. After taking the liquid, the dropper should keep the rubber head above, do not lay it flat or upside down, to prevent the solution from flowing back and corroding the rubber head.

3. When adding liquid dropwise, it should be suspended above the beaker, and do not touch the wall of the beaker, so as not to contaminate the dropper or cause contamination of the reagents.

4. Do not put the dropper on the test bench or other places to avoid contamination of the dropper.

5. The used dropper should be rinsed with clean water immediately for reuse.