Trimming back wiper blades yourself - not a good idea!

In the past it was indeed common practice to replace the rubber of the windscreen wipers. In those days, car workshops used to stock yard goods, the wiper rubbers were cut to size and then inserted into the straight metal mounting brackets. Mind you, we are talking here about the 50s and 60s. So in those days with that method, there was no question of trimming blades down.

With the introduction of the first panoramic windscreens and laminated safety glass (LSG), more and more curved windscreens were used. And the geometry of the previously inflexible and straight windscreen wipers also underwent a change. Wipers with pressure and claw clips began to appear, wiper blades were adapting to the geometry of the windscreen thanks to the special metal construction.

We have been dealing now with high-tech products for several years. It is true that conventional wipers still have a mounting frame with brackets and pressure joints made of metal. However, most modern vehicles today are equipped with the so-called flat blade or flat bar wipers. A spring rail presses the wiper rubber homogeneously onto the windscreen and, as a result of the flat design, the aerodynamics involved have become considerably improved.

Tip: Classic wipers can often be replaced by new flat bar ones.

The actual wiper rubbers consist of a mixture of natural and synthetic rubber, they are graphite-coated and boast UV protection. They perform hard work. In one wiper lifetime, several thousand litres of water are removed from the windscreen and also insects and all kinds of dirt from the street.

Tip: Depending on mileage covered and prevailing weather conditions, our specialists advise you to clean the wiper blades regularly with a damp sponge and some windscreen antifreeze.

In addition, it is advisable to frequently remove remains of insects from the windscreen and not to use the wiper blades as "ice scrapers" in winter. If the wiper performance decreases, the wiper blades have to be replaced. Our experts recommend the following routine: replacement of both wiper blades once a year.

Some suppliers of cutting tools promote the shortening of old, worn wiper rubbers with special blades. What sounds plausible initially, however, turns out to be difficult and not advisable in practice. Even with these tools the cutting process is not always successful. In order to achieve an absolutely straight and clean cut, skilful dexterity, absolute cleanliness and the right rubber temperature are all decisive. Incorrect course of action will render the wiper immediately unusable and then useless.

Even if shortening with a cutter is successful, the anti-friction graphite layer is then removed and also the flexing properties of the wiper lip and the wiper edge geometry are changed. The wiper tends to rub, the wiping pattern is not clearly defined. So-called grinding tools, which are supposed to "straighten" the rubber lip and remove dirt, but usually only damage it severely, are best left alone.

At the end of the day, the bottom line really is road safety. So it goes without saying that people should not play around with wiper blades themselves. Only original and high quality products guarantee a perfect wipe pattern. After all, our experts have been researching and developing the optimum bracket construction and a sophisticated and durable rubber compound for years. Whenever necessary, new windscreen wipers should always be fitted.

And no, we don't just say that because we sell high quality wiper blades, although we are, of course, pleased when you choose our wiper blades if you need some. But even if you don't choose our products, what counts in the end is that you always have a good, clear view, that you make sure your wiper blades function perfectly for as long as possible and that you always remain safe on the road. By the way: don't forget the rear windscreen wiper!