E910 wrote::lol: I remember when I bought my first car & guys telling me to take to A/C out as it would make my car faster. One of my mates did & all it did was make him hot in summer & unable to clear his windscreen in winter. Why buy a lexus if you're going to ruin it like that?? You'd be better off buying a carbon bonnet if you want to save a bit of weight. The factory ones weigh a ton
didnt buy a lexus :p
its very easy to clear a windscreen during the winter. you just have to know why it happens
On a cool, rainy morning, the air inside your car is similar to the air outside your car: heavy with moisture. When you enter the car and close the door, before you even start the engine you start inhaling and exhaling. That first breath you exhale is full to the brim with water vapour - at body temperature and this air pressure, it literally can't hold any more water.
Which is a problem, because air's capacity to hold water varies with temperature and pressure. That's why it's humid in the tropics (warm, higher pressure air can hold more water) and dry in the mountains (cold, lower pressure air holds less water.)
When the warm, moist air from your lungs meets the cold, moist air already in the car, the air from your lungs cools down, which leaves the water vapour from your lungs with nowhere to go. The water vapour solves this problem by condensing on the nearest and coldest surface, which in a cold car on a cool morning, is the cold windscreen in front of you.
The worst demisting solutions
Now you understand why the windscreen fogs up, it's much easier to see why some demisting strategies work better than others. For instance, if you rub the screen with your sleeve to remove some of the condensed water vapour, more vapour will condense from your next breath and mist it right back up again.
Wind down your windows and let more cold, moist air into the car, and it will still fog up since you're probably opening it just a little. If you open the windows enough so that the breeze is strong enough to stop your warm, moist breath reaching the windscreen, that'll work, but you'll wish you brought your scarf, and you'll still have those first few breaths stuck in place on the windscreen.
Likewise, if you just open an air vent or two, you're not doing enough to shift the warm, moist breath and doing nothing to remove the water already on the screen. I've seen some people turn on the recycled air function on the dash, thinking they're doing the right thing by keeping the cold, moist air out. While this slightly increases the air pressure inside the car, slightly increasing the water-carrying capacity of the air in the car, any water vapour that 'needs' to condense will still seek out the cold windscreen.
buying a cf bonet costs. taking something out of the car is free
if ive helped you in anyway vote for carlow to be the first tezzaworld drinking session