AA's Cardboard Trick: Stop Frost on Your Windscreen Overnight
AA's simple cardboard tip to prevent windscreen frost

As winter tightens its grip, drivers across the UK are facing the familiar morning chore of scraping frost from their windscreens. However, the AA (Automobile Association) has shared a remarkably simple and effective method to prevent this icy nuisance altogether, using an item most households have to hand.

The Simple Cardboard Shield Solution

According to advice on the AA's website, a piece of sturdy cardboard placed over your windscreen can act as a highly effective barrier against frost. The motoring organisation suggests that if you don't have access to a garage, parking close to your home can help, but using a shield is a proven tactic. A dry piece of cardboard secured under your windscreen wipers overnight will stop ice from forming directly on the glass, making your morning routine significantly quicker and easier.

The tip, which emerged in early December 2025, has been validated by numerous drivers on forums like Reddit. One user advised, "You can put a towel or cardboard or something similar on the windshield in the evening and remove it when you need to drive," while another simply recommended keeping "a piece of cardboard" in the boot for this specific purpose.

How to Execute the Hack Correctly

For the method to work effectively, it's crucial to follow a few simple guidelines. First, ensure the cardboard is completely dry and robust enough to withstand damp conditions. Flimsy materials like newspaper should be avoided, as they will absorb moisture and likely freeze to the glass. Simply place the cardboard sheet across the entire windscreen and tuck it securely under the wiper blades to prevent it from blowing away.

This creates an insulating layer that prevents the cold glass from coming into direct contact with the moist night air, thereby stopping the frost from forming. The AA notes that while a purpose-made windscreen cover is generally more effective, cardboard serves as an excellent and readily available alternative.

A Warning Against Driving with Poor Visibility

The AA couples this handy tip with a serious safety and legal warning. Driving with a partially cleared or obscured windscreen can result in a £100 fine and three penalty points on your licence. The organisation cautions that in the rush to get to work, it can be tempting to drive off as soon as a small patch of ice has melted, but this dangerously obstructs your view of the road.

Regardless of whether you use the cardboard method, a dedicated cover, or traditional scraping, it is vital to ensure your windscreen is fully clear and demisted before setting off. This advice follows other recent motoring tips, such as one from the RAC about removing specific items from your car to reduce condensation.

So, before the next frosty night, consider saving that cardboard box from the recycling. This straightforward piece of forward planning could save you time, hassle, and help you stay on the right side of the law this winter.