What you need to know about windscreen wiper blades and quality of cleaning?
Wiper blade is made of metal elements, plastic and rubber. Special rubber compound of which the filler is made, is resistant to low and high temperatures, UV radiation, as well as to alcohol used in washer fluids.
Unfortunately, nothing is everlasting, so time and usage do their work. With time, rubber becomes hard, loses its elasticity and becomes fragile. So-called edge is exposed to destruction. Friction against firmer glass leads to rounding of edges which results in worse quality of cleaning. Numerous trails appear. In winter time rubber edge often snatches or becomes fully damaged.
In this case we have to replace a blade unconditionally because hard metal elements can scratch the glass, the replacement of which can be very costly!
windscreen surface and washer fluid
In the course of car usage both screen wiper rubber and other components of system are getting worn up. The surface of glass is constantly bombarded by sand particles, stones, dust and dirt.
The older the car, the higher mileage it has, the more the windscreen is damaged. Under a microscope its surface looks like porous pumice.
Residues of oils and greases raised from a road surface, insects, wax from car wash cleansers for varnish covering protection, get in porous glass surface.
All these factors influence the quality of cleaning and rubber lifetime.
Therefore, it is recommended after the car is washed to wash up windscreen manually with chemicals specially designed for windscreen wash. This treatment will allow to remove grease from glass, remove the remains of insects, wax and other pollutions.
It is also necessary to remember to apply special liquids for sprinklers. Highly concentrated, not proper liquid will not wash better at all. On the contrary – it can have a destructible effect on rubber blade, shortening its lifespan.
During our laboratory research we have noted that in moderate temperatures, the best cleaning effect is reached with a little winter washer slightly diluted with distilled or demineralized water. Tap water can leave deposit in a tank, pipelines and sprinkler hoses!
The wiper arm is very important and underestimated element of screen wipers system.
The strength of blade pressure against windscreen coming from the spring in the arm weakens with car age and can course a bad quality of cleaning even with a new screen wipers. Salt, dirt, sand and dust lead to abrasion of moving arm joint. This weakens strength of blade pressure and results in improper operation of wipers. Trails and unwiped sectors may appear on a windscreen.
In extreme cases, absence of any pressure was observed, meaning that the blade did not wipe at all! In this case you can try to improve joint mobility, greasing it with penetrating oil in aerosol, straightening and lowering the arm back on a screen a few times.
A proper strength of arm pressure is especially important if you use flat (frameless) wiper blades!
If the arm was bent for any reason (e.g. the car after accident, defective brushes in automatic car wash, etc.) blade can jump up and produce grating sounds during operation, especially on one side. The blade edge should perpendicular to glass surface. This problem is very frequent and it might be necessary to correct arm’s geometry or simply replace it.
wiper drive system
The last element is a drive system of screen wipers. In old cars, abrasion of pins on which screen wipers are settled may occur, as well as damage of sliding elements of lever system hidden under the screen bottom part. It can assert itself in jerks and irregular wiping performance. As a rule, these elements are assembled as one part, but several drops of penetrating oil can help for some time.
Bad performance of wipers can also be caused by too big gaps, resulting from usage. Whole system geometry changes in uncontrollable way, and signs can be identical: jerking, irregular work, and even blade hitting the glass seal. Unfortunately, in this case it is necessary to replace the whole wiper drive system.
All above observations result from thirty years of experience and laboratory research by our company. Our aim was to draw your attention to the fact how complex and important part of your car the screen wipers are. Take care of each element of this system. Buy only proved products of known manufacturers with long-term experience that guarantee quality, safety and comfort travel in bad weather.
If you have any additional questions, contact us by the e-mail: firstname.lastname@example.org