The washing-up liquid hack is said to curb car condensationThis article contains affiliate links, we will receive a commission on any sales we generate from it. Learn more
Rubbing a thin layer of washing up liquid onto dry windows inside your car can prevent condensation(Image: Claire Schofield)
Motorists are being urged to keep washing-up liquid in their cars – as a bottle of dish soap can help prevent condensation. With freezing temperatures forecast this week, many drivers will wake up to find their windscreen frozen over and condensation on their windows.
Condensation is a very common problem in the cold autumn and winter months. It is caused when warm air inside cars meets the cold surface of windows, forming water droplets on the glass as it cools, which can appear as fog or mist. Condensation generally forms overnight when outside temperatures are lower and tends to be more pronounced in bouts of very cold weather.
A foggy windscreen can take a frustrating amount of time to clear, but luckily, there is a simple remedy you can use to help avoid this problem – and all you need is a bit of washing-up liquid. According to experts, applying a thin layer of washing-up liquid to dry windows inside your car is a cost-effective way to help prevent condensation from forming. According to The Express, dish soap liquid contains surfactants, which reduce the surface tension of the glass, making it harder for warm, moist air to condense into water droplets.
Instead of forming a layer of water, the washing-up liquid essentially creates a barrier that prevents water droplets from clinging to the glass, causing moisture to remain in the air or be more easily wiped away. Experts at Home Things explain: “By taking a small drop of washing up liquid and rubbing it into the condensation-prone window with a dry cloth, you can completely stop the issue altogether.
“The washing-up liquid forms a barrier on the surface of the windows, preventing the water from sticking. So in the space of just a few minutes, you can put a stop to the damp, mould, and mildew that wet windows can cause.”
It may be a cheap and easy way to tackle a common seasonal problem, but you will need to reapply it regularly as it’s not a permanent fix. Experts recommend using the hack in conjunction with other settings in your car, such as using your air conditioning and heater, opening windows to promote airflow, and employing dehumidifying products like packets of silica gel to absorb excess moisture from the air. Amazon sells a two-pack of Reusable Multipurpose Dehumidifier Bags for less than €15.
Explaining how to use washing up liquid in your car, experts at Mick’s Garage said: “Take one wet dishcloth, squeeze a good blob of washing up liquid onto it, apply in a circular motion to the whole inside of the screen, then take another clean, dry cloth and gently wipe off.
“The idea is to try and leave some of the washing-up liquid on the screen while still getting a dry streak-free finish. I think you’ll be pleasantly surprised by the results! Apparently, shaving foam also works just as well. The technique above will greatly reduce the amount of condensation on the inside of your screen, but it won’t eliminate it altogether; you’re still going to need to use the car’s demister.”