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Another vote here for vinegar on kitchen roll, cheap and very effective.
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Glazing companies sell the best glass cleaners IMHO. They need the glass perfectly clean and smear-free before making sealed double-glazed units. I always use BOHLE proffessional glass cleaner.
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I have the same problem with a residue of Rain-X on the screen that the previous owner put on. Anyone know what to use to get rid of this. I've tried vinegar, panel-wipe spirit (used to prep surfaces for painting), Autoglym fast glass, meths etc..
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If you *must* remove it, then some have advocated washing soda solution, otherwise a mildly abrasive glass cleaner will usually work ok, or toothpaste, or Cif.
Unfortunately, I'm a big fan of Rain-X, and the best thing is to re-apply it properly, using two coats for perfect coverage. Make sure your wiper blades aren't worn out.
I've never had problems with smearing and the only negative I have found is that passing under street lighting can tend to make the raindrops more obvious. This is from 20+ years of using it on about a dozen cars. I never get tired of seeing those raindrops marching up the screen and away. Sitting behind an HGV in the rain with perfect visibility without wipers is another plus. Rain-X was one of the first things I got for my cars when I moved to the UK in '97. I'd never go back to having distorted vision through sheets of water clinging to the glass. Others must agree with me, as Rain-X is still going strong after about 20 years.
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Hopefully not opening the can of worms, but personally I regard Rain X as the worst thing ever invented for car windscreens!
It does seem to be one of those things that polarises opinion and generates strong views.
--
pmh (was peter)
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Pete M, I wouldn't say that I dislike the Rain-X stuff, as it worked quite well when I first got the car 4 months ago. it's only lately that it's got patchy and smeary. But how do you re-apply it if you can't get the old layer off. Can I just put some more on top of the stuff that's on, will that be ok or will it make matters worse.
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Try neat ammonia solution on a piece of kitchen roll, taking care to follow safety precautions. Follow up with warm water/strong detergent mix . The best thing I've found to date to get rid of smears.
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