Ajax, the household and industrial cleaner did a small ambient campaign in Romania.
Small & simple, but creative..

They used the entrance doors of supermarkets in a very creative way: they modified the doors to look like they’re dusty, with in the middle two gigantic squeegee’s (the tool you need to clean your window).
When people were standing outside, they couldn’t see anything through the doors, but as they entered it looked like the squeegees cleaned all the dirt away.
Maybe this campaign isn’t the most creative one you have ever seen, but you have to admit; for a cleaning product, it’s pretty good.