Using just a few millilitres, as you would in a four-litre or so washer bottle, it was a screen star, topping the cleaning tests. No surprise it struggled in the freezer, lasting just an hour, but this is an impressive debut. Instant Windscreen Washer Tablets are super-concentrated dissolving tablets specially formulated to completely remove bugs, road film, dirt, and grime, leaving windscreens sparkling clean. Sold in a tube of 25 tablets - enough to make 25 gallons of cleaning solution! DocVision windscreen cleaning tablets are a great choice for businesses looking for smart ways to reduce their carbon footprint and the impact of their operations on the environment

It was much more competitively priced in the summer dilution, and it was particularly effective at shifting the oil, helping it top our performance tests. A worthy champion. Rain-X is a well-known brand for its water repellent, and the company offers its own windshield washer fluid. The 2-in-1 all-season formula works against light snow and ice, effective to -25°F (-31°C) while powering off bugs, road grime, and salt. Along with melting precipitation, this windshield washer fluid also applies Rain-X technology to the windshield, giving it a hydrophobic protectant to help bead water. It is formulated with de-ionized water for improved visibility and streak-free cleaning. BEST BUY As we see so often in our tests, a good all-round performance is the key to victory. Where the Prestone, which claims to melt ice down to -18C, starred was in the freezer: here it lasted 150 minutes before icing over. You pay for it, though, because it has to be used neat to get this performance.In its summer mix it makes 25 litres. At its winter dilution it is competitively priced, but only just made it past an hour in the freezer. It made up for that with good oil removal, although others did better on the single-pass bug test. The cold season is hard work for a car. Not only do parts such as batteries need extra care, but slush, mud and ice are all waiting to clog up your windscreen. With top European quality control certification and approval, DocVision is compatible with all vehicle materials, parts and components and supports: If possible, find a screenwash that contains Bitrex. This additive is the most bitter tasting thing imaginable and will make anything unpalatable and almost impossible to swallow should a child or animal try and drink some. While purchasing actual windshield washer fluid is convenient—you just pour it into your reservoir—there is the more cost-effective option of using tablets. With these, you simply drop them into your reservoir filled with water, producing windshield washer fluid. Each tablet can be mixed with four liters of water, so this option gives you a total of 120 liters of windshield washer fluid.

First we calculated the costs of each in their winter and summer mixes. For the former we chose coverage down to about -10C, where there was a choice of mixes. The Rain-X solution is a pre-mixed solution, so you'll simply have to pour it into your reservoir. It's a bit on the more expensive side when you compare it to concentrated solutions that you mix yourself, but it's comparable to other one-gallon solutions. It was also among the leaders in the freezer, lasting two hours before starting to go solid. So why does it finish so far down the leader board? It’s all down to price, with rivals achieving similar results for less. for quite a few years have been using industrial glass cleaner from eurocell or any upvc supplier pour what you want into the washer bottle and top up with water Great for the Environment Completely environmentally friendly, DocVision windscreen cleaning tablets are 100% biodegradable and have no impact on plant, animal or marine life.It's also ammonia-free, so it won't harm chrome, paintwork, rubber, or plastic. Nextzett says it leaves a fresh citrus scent and does not contain toxic methanol. But it did work well in the freezer, going some way to justifying the cost, lasting a decent two hours. Like the rival Bluecol, it needed the double-wiper sweep to make decent progress on our bug and oil.

This means that a concentrated one is better value but isn't the best for topping up on the go unless you have a reliable water supply. On the other hand, ready-mixed screenwash take up more space. It really comes down to preference but we suggest going for concentrated. What to look for in a good screenwash It was close to the One Shot, and scored well on both the baked-on bug and oil. It was particularly effective on the dead insect in the double-swept area – a showing that helped overcome its price disadvantage. Bauer Consumer Media Ltd, Company number 01176085; Bauer Radio Limited, Company number: 1394141; Registered office: Media House, Peterborough Business Park, Lynch Wood, Peterborough PE2 6EA and H Bauer Publishing, Company number: LP003328; Registered office: The Lantern, 75 Hampstead Road, London NW1 2PL With over 35 million vehicles on the UK’s roads, we get through an awful lot of screen wash and a huge amount of plastic bottles to store it in. Once empty, these plastic containers are usually discarded and sent to recycling plants. Recycling a single plastic bottle can use enough energy to light a 60 Watt bulb for up to 6 hours!

When choosing a screenwash, your top priority should be temperature. In the winter months, you'll be needing a screenwash that can cope with the colder temperatures. Some can work at -20 degrees if you live somewhere where it gets really cold. Despite using just the one dilution, it lasted a respectable two hours in the freezer. The bugs troubled it on the screen although it did much better on the oil, completely removing it. The second entry from the Tetrosyl line-up is from one of the oldest names in the sector, and is more conventional than the Demon Shot Booster (left). Neat, it claims to be good for -36C, but at the -9C solution we tested it at it lasted 90 minutes in the deep freeze, and was one of the cheaper options. That's why we all use screenwash. The challenge lies in using one that clears a windscreen without smearing any residual mud or insects across it. Wonder no more and see CAR's recommended screenwash products below.

January 28, 2022: Removed discontinued Sonax Clear View Windshield Washer Concentrate. Updated product link for Prestone AS658P All Season 3-in-1 Year Round Windshield Washer Fluid. Replaced Wemk Windshield Washer Tablets with Dokiko brand.Whereas recycling plastic containers is a good option, many also find their way into landfills and also some even get dumped into our oceans – which is becoming a major environmental problem around the world.