How to assemble:
1. Flatten the ridge on the nipple and insert it into the screw cap, aligning from top to bottom.
2. After assembly, flip the screw cap over to check if the nipple’s wings are securely locked into the grooves.
3. Check that the air valve is open by verifying the slit on the valve. If it is not open, gently pry the base of the air valve open using a pointed tool.
How to clean:
**Use dedicated detergent and cleaning brushes.
When cleaning, hold the grooves with your fingers to prevent suction holes from stretching and use a nipple brush to clean gently.
Cleanse the air valve and suction hole gently by squeezing them between both hands.
