How to open the dust cover of small powder such as saline spray?

1. Remove the paper seal on the dust cover and turn on the switch on the dust cover.

2. Remove the dust cover of the spray bottle, unplug the bottle cap, inject a proper amount of normal saline, and reinstall the dust cover on the spray bottle.

3. Turn off the switch on the dust cover and shake the spray bottle several times to fully mix the normal saline and air.

4. Disassemble the protective cover of the nozzle, aim the nozzle at the part where physiological saline needs to be sprayed, and gently press the nozzle to spray it.