Real talkIf your car’s AC isn’t cold or you’re in humid weather, this takes a bit longer but it works reliably.

Bill of materials

• Car with AC and defrost setting

Assembly

1. 1Start the car engine.
2. 2Turn on the AC and set it to the defrost mode (usually directs air to the windshield).
3. 3Turn the fan to high.
4. 4If available, turn on the rear window defroster too.
5. 5Wait a few minutes for the moisture to clear.