On April 4, the Stockholm travelers were able to get a good laugh on their way to work. AJAX, the category leading cleaning product, had during the night before proved the power of their product on the walls of the busy subway station Saint Eriksplan in Stockholm. Around the Stockholm subway stations, Clear Channel are in the middle of replacing old billboards. They have been up since the 60s - and behind them decades of dirt have accumulated. A canvas of 60 years of public transport-dirt…
