Atmosphere
The air dryer blows out moisture it has collected.
Moisture in the air around the glass, cup, etc.
An a/c unit can also remove moisture from the air. No moisture means no condensation or frost on the wind screen. Everything is as it should be.
The AC takes the moisture out of the cabin air and that helps clear the inside of the windshield from moisture faster.
Either warm the air so it can absorb more moisture, or reduce the amount of moisture in the air. No you can't. Sorry? Move its not going to happen. Come up with an invention to stop it.
Moisture in the air primarily evaporates from bodies of water, such as oceans, lakes, and rivers. It can also come from plants through a process called transpiration, where water evaporates from leaves.
Air Dried Moisture
If the relative humidity is high, it means that the air has a lot of moisture in it. This high moisture content can lead to feelings of stickiness or dampness in the air.
Water vapor in the air condenses when the ground cools at night. the cooler ground (often due to radiation into space when it is clear) cools the air near the ground. This cooler air cannot hold as much moisture as warm air and the moisture condenses as fog.
They come from the sunlight that's shining into the moisture-laden air in front of you. The colors are always there in the sunlight. They just have to be spread out before you can see them, and the water droplets in the air do that job.
Relative humidity is a measure of how much moisture is in the air relative to the maximum amount of moisture the air can hold at a specific temperature. It is expressed as a percentage, with 100% indicating that the air is completely saturated with moisture.
The cold glass cools the air close to the outside of the glass and causes the moisture in the air to condense on the outside of the glass when the molecules in the air come close enough together to touch one another..