I was under impression GM ones had jumped from around £3 each to £15 each now on trade? 
£9 rings a bell ? I don't recall a pair being anywhere near £3 or £6.
But clearly, for £15 and 2 years life and superior performance generally with twins, it does look like GM blades aren't selling. They are poor by comparison to twins ime. To suggest otherwise, well... 
I think GM come out around £14 on TC. Just had to buy some twins yesterday, as with the rain, the melted ones (I *think* they were GY) on TBE weren't too effective
. So twins are a shade over £17 on Halfords trade as of yesterday.
Perfomance wise, I tend to get about a year off aero style (not noticed a great deal of difference between GY or Bosch twins), and about 6 months from GM. So aero work out cheaper than GM for me
. However, none of the aero ones I've tried have been that great at moving bugs and general crap from the screen (compared to a GM blade) - do you see that? Additiionally, take a day like yesterday, coming up the M40, it was hammering down, and 60ish mph was about the limit possible, and the Bosch ones were really struggling to clear the screen of water (better on the slower wiper speed, rather than the auto wiper's fast speed), though the wipers were brand spankers, maybe need an element of bedding in? Dunno.
As for the relatively short life I get from wipers, I wonder if its the amount of dust were I live. Those who've been here a few times will know what I mean. As the wind blows across the fields, it seems to gather dust, pollen etc, and dump it all over the cars, drive, property. I wonder if that becomes abrasive in the summer months, and that first flick of the wipers to clear the dust will always be on a dry screen
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Topic: Annoying noisy wipers. (Read 7243 times)