Online timer for 167 seconds
You have already run the countdown once, but the windscreen still has a stubborn veil of frost, so you start another 167 seconds while the demister continues working. Keep the car stationary and use the extra interval to clear loose frost from the side windows and check that the wipers are free rather than forcing them across frozen glass.
With the windscreen warming again, the timer tab may slip into the background while you check the weather or a message. The countdown should continue, although some phones may delay its sound when the browser is restricted or the device is muted. Leave the browser open, keep the volume audible, and glance back before setting off if you cannot rely on the alert.
A second run gives the heater more time, but it does not mean the glass is ready automatically. At the alert, look across the whole swept area from the driver’s seat and clear any softened frost that still blocks your view. If the screen becomes clear early, stop the countdown; if an opaque patch remains, wait and reassess instead of driving with a narrow opening.
Common questions
Why might clearing a frosted windscreen take longer than this countdown?
A heavier frost, low overnight temperature or a windscreen shaded from the morning sun can slow the warming. Another run may be needed until the full driving view is clear.
What if the windscreen clears before the second countdown finishes?
You can stop the timer and finish checking the side windows, mirrors and wipers. Only move off when the frost no longer obstructs the view through the glass.
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