Cleaning lady

Ever wondered what happens to those illegal ads posted all over town ("Western company wants to buy your flat for cash. Phone xxxx") .. ? Well, the mystery revealed today! There's a lady who goes around armed with a squeegee brush and a spray bottle and wipes them off lamp posts, rain gutters, government notice boards (the preferred location because it's easy to stick them on to the glass cover ..) - and anywhere they've been glued to.