This is how to scrape

> Scrape glass properly

> Test the suitability of glass surfaces

> Preparation for glass cleaning

> Avoid damage by means of blade changes

> Remove stubborn dirt

Whether adhesive residues, mortar or paint splashes: For particularly stubborn dirt, scrapers are incredibly effective for preparation work. But how can they actually be used safely and what makes a good scraper? clean Magazine gives valuable tips.

How to scrape glass properly and what to look out for

Before you get down to work, it is important to check whether the glass surface to be cleaned is suitable for scraping. On acrylic, crown glass, sun protection and single pane safety glass it is better not to use it. The risk of leaving scratches on the delicate surfaces is too great.

Are you unsure? Then just test the scraper in an inconspicuous place. If you are not sure whether it is single pane safety glass or not, the lighter trick will help you.

The preparation work is just as important: Clean the glass surface to be treated wet and with a release agent. In that way you make sure that no dust particles remain behind. Then check if the glass and your tool are in perfect condition. You should report any scratches that already exist and change the blade if it is blunt.

Finally, scraping is also done when wet. And always in one direction only. Never pull back, otherwise there is a risk of scratching. If any residues of adhesive or mortar stick to the blade after scraping, you can change or turn the blade if necessary - and then continue.

UNGER ErgoTec Ninja - effective and flexible


Glass scrapers, such as the UNGER Ergotec Ninja, are perfect for removing hard to remove dirt on glass surfaces. The UNGER Ergotec Ninja has a premium glass scraper stainless steel blade with two sharp sides. It has a perfect cutting angle and has been specifically designed for precise, quick and easy application on glass. Practical: Not only can the scraper be carried in the matching holster, but it can also be easily mounted on a telescopic pole. In that way, safe working from the ground is possible. Thanks to its flexible mechanism, the angle of the scraper can be changed between 0 and 30 degrees at the touch of a button. And if the blade has to be changed, it can easily be done with the robust slider mechanism.

What are your experiences with the scraper technique? Do you have any tips for your colleagues? Then write to us in the comment field, via Facebook or

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