Using Winter screen wash in summer

• Using Winter screen wash in summer
  Posted by seagul on 16 May, 2026 09:59
• Hi folks
  Is prestone screenwash (winter formula) safe to use in summer. Only apprehension is that it will have de-icer which might strike more streaks on windshield in summer. Otherwise what stop it from cleaning the windshield in summer too. Screenwash name is Prestone Max visibility screenwash (winter formula).
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• #1 Reply
  Posted by peak4 on 16 May, 2026 14:52
• This one??
  

  Prestone Extreme Performance Screen Wash | Melts Ice to -18°C

  Tested in the most extreme of conditions, the Prestone Extreme Screenwash can clear your car’s windscreen of stubborn dirt and melt away ice.

  Prestone · prestoneuk.com

  
  
  
  Name: Prestone Concentrated Screen Wash 5 Litres
  Manufacturer’s Code: PSCW0028A
  
  How to Use:
  Dilute the screen wash as per the instructions on the back of the pack.
  
  WINTER – Use neat
  
  AUTUMN – 1:9 Screen Wash to water
  
  SPRING / SUMMER – 1: 19
  
  Then, locate your screen wash reservoir under the bonnet and top up your screen wash as required.
  
  To reduce spillage and for greater control, you may wish to use a funnel.
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• #2 Reply
  Posted by baroudeur on 18 May, 2026 12:19
• Quote from: seagul on 16 May, 2026 09:59

  Hi folks
  Is prestone screenwash (winter formula) safe to use in summer. Only apprehension is that it will have de-icer which might strike more streaks on windshield in summer. Otherwise what stop it from cleaning the windshield in summer too. Screenwash name is Prestone Max visibility screenwash (winter formula).
  

  
  I use that screenwash until well into summer without any problems, in fact, it may be helpful in removing dead flies.
  
  Here is the Safety Data Sheet https://tinyurl.com/38cdrhnu
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• #3 Reply
  Posted by seagul on 18 May, 2026 14:59
• It seems that labelling summer or winter is just marketing tactics but obviously summer formula wouldn't be effective in winter. Prestone is no 1 brand with only £2 more expensive than ordinary ones but it contains all essential ingredients which eliminate dirt, grease & grime. Can remaining washing liquid be rubbed manually on wiper blades rubber to clean it. And can same screen wash be used on the glass of side windows with microfiber cloth.
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• #4 Reply
  Posted by peodude on 18 May, 2026 15:40
• Is this the stupid question thread? Can I join in? I usually check my tyre pressures in Asda, will it be a problem if i mix it with Tesco air?
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• #5 Reply
  Posted by andy_foster on 18 May, 2026 16:27
• Quote from: peodude on 18 May, 2026 15:40

  Is this the stupid question thread? Can I join in? I usually check my tyre pressures in Asda, will it be a problem if i mix it with Tesco air?
  

  
  You must be new here. This is what the OP does - he posts random dumb motoring advice questions.
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• #6 Reply
  Posted by seagul on 18 May, 2026 17:40
• Quote from: peodude on 18 May, 2026 15:40

  Is this the stupid question thread? Can I join in? I usually check my tyre pressures in Asda, will it be a problem if i mix it with Tesco air?
  

  
  Most important thing is to find out that how this question even come in to your mind. Members should only focus on the original query.
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• #7 Reply
  Posted by big_bad_golf on 18 May, 2026 18:08
• Quote from: peodude on 18 May, 2026 15:40

  Is this the stupid question thread? Can I join in? I usually check my tyre pressures in Asda, will it be a problem if i mix it with Tesco air?
  

  
  I prefer pure Waitrose myself, it's more refined. Take a jack and make sure you expel all previous low quality air from each tyre before refilling.
  
  Top tip: Buying 4 jacks allows you to save money on the airline timer.
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