In addtion to the above video, in which we fit Bosch Aerotwin windscreen wipers [eBay UK | eBay US] and apply RainX [eBay UK | eBay US] to our Landy, you can check out our guide below that will help you decipher the current condition of your wipers - and if you should change them.

100% Condition

The wipers above are working perfectly as they should. There's no smearing, smudging or hazing left behind after wiping. Wipers are at 100% condition.

85% Condition

Up to 3 permanent streaks in outer view area, but no action is necessary.

70% Condition

A maximum of 1 permanent streak in central view. Wipers replacement is recommended.

50% Condition

Up to 4 permanent streaks in outer field of view or 12 temporary streaks in central view area. Wipers are wearing and will get progressively worse. Think about changing soon!

40% Condition

Up to 6 permanent streaks are within the outer field area and many temporary and permanent streaks are visible across the central field of view. These should be evenly spaced. You should ideally change the wiper blades now.

25% Condition

Patches of water is left behind after a full wipe, change your wipers immediately!

Hazing, very dangerous as this can catch sunlight or headlights and impair vision. Wipers need to be replaced as soon as possible!

5% Condition

'Chatter' marks prevalant, wiper blades now skip along windscreen and do not remove water. Replacement is urgent.

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