Thread: Riddle me this...rain water v water from wipers

just a quick guess.
volume of water spread evenly with rain as opposed to a concentrated squirt in 2 spots.

i also notice this, my guess would be just more water spread across the windscreen, not the piddly amount that the sprayers splash on there.

I don't know why you have observed what you have Steveo, but tap water (presume this is what was in your washer bottle) tends to be slightly alkaline (it is chlorinated) and have a range of dissolved minerals in it, including carbonates which also contribute to its alkalinity. Rain water tends to be acidic with little dissolved minerals. Also the rain tends to last for a longer time span than the time to squirt water on your windscreen. This would mean that the windscreen is wetter longer, allowing the moisture to more deeply penetrate into (and under) the dirt particles, assisting in their being washed off the screen. Oh, and rainwater includes angels pee, which reputedly can achieve miracles.

Cheers
KarlB

Your washer fluid isn't contaminated with something is it?

I would guess the rain lasted much longer than the attempt with the washer, and properly wet the muck on the windscreen. And there would have been a lot more of it, and probably better distributed.

John

Originally Posted by KarlB

I don't know why you have observed what you have Steveo, but tap water (presume this is what was in your washer bottle) tends to be slightly alkaline (it is chlorinated) and have a range of dissolved minerals in it, including carbonates which also contribute to its alkalinity. Rain water tends to be acidic with little dissolved minerals. Also the rain tends to last for a longer time span than the time to squirt water on your windscreen. This would mean that the windscreen is wetter longer, allowing the moisture to more deeply penetrate into (and under) the dirt particles, assisting in their being washed off the screen. Oh, and rainwater includes angels pee, which reputedly can achieve miracles.

Cheers
KarlB

Thanks for responses to date.... but this is looking like a winner. I have observed it on a few occasions whereby I have used heaps of squirts and same result. Done it intermittant...same result. Then it rains and all clear. Thought maybe the power of the rain splatting may have an effect. Also the actual rain time was probably about 4-5 mins tops. So thought something must be in the rain.

Regards

Stevo

My D2 washers work fine!
Must be a D2a thing

Originally Posted by Tombie

My D2 washers work fine!
Must be a D2a thing

,

Regards

Stevo