Alludes to a Saigyo tanka. He is implying that he wishes the dew dropping would clean the sad, unclean world.

My Translation

The dew drip-dripping,
Testing this fleeting life—
This sooty world

Original Japanese

露とくとく試みに浮世すすがばや

Pronunciation

Tsuyu toku-toku
Kokoromi ni ukiyo
Susuga-baya

Literal Translation

Dew dropping-dropping [sound word]
[trial/test/attempt] for [transitory, fleeting life, sad world]
[sooty place / rinse [denoting a wish]]
Year: 
2011