When a glass gets sticky on the bottom after being placed in the freezer, it is typically due to condensation and the subsequent freezing of moisture on the surface of the glass. Here's what happens:
Moisture Condensation: When you place a glass in the freezer, especially if it contains a cold beverage or is damp, the surrounding air cools rapidly. The cold temperature causes the moisture in the air to condense on the surface of the glass.
Freezing: As the moisture condenses on the glass, it can freeze quickly due to the low temperature in the freezer. This frozen moisture forms a thin layer of ice on the surface of the glass.
Stickiness: The frozen moisture, or ice, on the bottom of the glass can create a sticky sensation when touched. This stickiness is caused by the moisture on your fingers or the warmth from your hand partially melting the thin layer of ice, creating a wet and sticky surface.
It's important to note that the stickiness is temporary and typically resolves as the ice melts or evaporates. If you want to prevent or minimize the stickiness, ensure that the glass is dry before placing it in the freezer. Additionally, using glassware with good insulation properties or using coasters under the glass can help reduce condensation and stickiness.