At the summer mix ratio the cleaning performance was adequate, clearing the oil and leaving a small residue of glue, but no smearing. In summer this makes it seem good value compared to some ready-mix rivals, but the advantage disappears in winter. Not only is eco refill screen wash much better for the environment, but you still get the same level of high-performance cleaning as from our ready-to-use screen wash. and in winter, that’s important, with our powerful cleaner cutting through the worst dirt, salt, and road dirt that you have to deal with out on the road As well as testing and our experience of using multiple screen washes, we also based our recommendations on the latest research and a number of factors. Some of the factors that we took into consideration included the formula’s type, seasonal use, freezing point, effectiveness and value for money. Conclusion 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.

Can I just use water? It is best to use a screenwash as these have been specially formulated to effectively clear your windscreen. Water will not contain the cleaning agents that screenwash has, so may not be able to remove tough dirt such as tree sap. Water also has a freezing point of 0ºC. 2. Does it matter what Screenwash you use? Developed to the same high performance standards you’ve come to expect from prestone, eco refill winter screen wash can also help you to reduce plastic waste. thanks to its concentrated formula, just one small bottle of 500ml prestone eco refill makes 5 litres of winter-ready screen wash – that’s a whole standard-sized bottle of screen wash for a fraction of the plastic This depends on the time of year. The colder it is, the more screen wash you'll need to prevent the liquid freezing in extreme cold. Each bottle of screen wash will detail the proportion of wash per litre of water, depending on the time of year. 3. Is Screenwash the same as antifreeze? There’s no cheaper way we could find of making screenwash than this, except maybe putting a squirt of Fairy Liquid in the reservoir. But as with most things, you get what you pay for and the tablets seemed to do little more than colour the water . We now put Bitrex in our screenwash and antifreeze products, to help protect your family. Officially the world's most bitter substance, just a tiny amount of Bitrex makes our products extremely unpalatable - and therefore safer - by helping prevent your children and pets from accidentally swallowing something they shouldn't."

What is it?

portable - contrast to a bottle of car screen washer fluid, the screen wash tablet for car is lightweight, it does not take up too much space, and solid for easy storage.

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 environmentWith 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! The Halfords wash gave the best cleaning performance and excellent freeze resistance at a reasonable price so takes the win here, but we’d recommend buying the ready mix rather than the concentrate as – bizarrely – it’s better value. Unparalleled winter protection: experience extreme performance during winter with the ability to use the concentrate neat, providing exceptional protection even in frigid temperatures as low as -23°c. The instructions recommend it is used at the ‘optimum clean’ dilution ratio of 1:9, which stops freezing down to a claimed -3 oC.

We managed to use one tablet for 4 litres of water and achieved really good cleaning results with it! Seasonal versatility: adapt seamlessly to changing seasons. dilute the concentrate during spring and summer to create up to a staggering 100 liters of screenwash, ensuring you're well-equipped year-round. The Halfords -10 Concentrate Screenwash has a warm berry fragrance and keeps your windscreen free from bugs, dirt and road grime. The only concern we would mention is that they only go down to -3 degrees, so depending on how mild/bad our winters are you still may need to top up with concentrate to stop the screen wash freezing. The company has opted to make the products look different by colour (and smell) coding them according to the temperature protection level. The -20C liquid we selected is green and ‘Citrus’ flavour.

3 in 1 Super Squeegee and Ice Scraper

The amount of times I have had to use plain water because I have run out, especially in the winter! The Doc Vision tablets make perfect sense.

note - 1 tabblet 4l is the way of summer use and does not prevent water from freezing in the tank during winter. the temperature requirement needs to be higher than -5℃(23℉). it's better to mix with an antifreeze agent to improve cleaning performance in winter.

\r\n\t\t\tHalfords Demister Pad

We tried it at the suggested level for protection down to -22C and it was fine and fluid after several hours in the freezer, but at that mix ratio it would make little more than half a litre. In fact, the instructions only suggest diluting it by up to a factor of 3:1, which means one bottle would only make a litre of fluid. Since the average washer reservoir is three to four litres, that’s going to be expensive.