When the color changes, you can consider drying them.
Take out the silica gel desiccant, pour the silica gel desiccant into a glass bowl, use a microwave oven to dry them, and then they will return to their original color.
130ml air dryer:
Product features: Repeated use.
Product function: Air drying, filter dust, improve service life and ozone concentration.
Internal capacity: 130ml.
Cylinder outer diameter: 32mm.
Size: 260*38*38mm.
Weight: 0.2kg.
Gift: 2 pipe clamps.