Graffiti is for some people a legitimate means of expression, for others a scourge to be wiped out in many Swiss towns and cities. But there are a few people who profit from the mess, cleaning it up in exchange for a regular paycheck. Philipp Zurbriggen (left), Terje Isler und Piero Ranieri erase the souvenirs left by spray painters.
Pictures and text: Christoph Balsiger, swissinfo
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All the windows within reach have to be protected before cleaning can begin.
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An environmentally friendly substance, which softens the graffiti paint, is smeared over the marks.
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Graffiti can be removed from any wall, be it concrete or sandstone, without causing any damage.
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High pressure hot water is used to to complete the removal process.
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The process removes virtually all traces of graffiti.
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Occasionally, a quick wipe is all it takes to clean up.
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A day later, the wall has dried and can be painted over. A protective layer stops colours seeping into the brickwork.
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New graffiti will have a short lifespan. All it takes now is some hot water to get them off.
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