Sentence:  After selecting a sheet and inspecting it for flaws ( even the best sometimes has foreign ' nubbins ' on its surface ) , I sponge it thoroughly on both sides with clean , cold <WSD>water</WSD> . 
Meaning of the word marked with <WSD> tags:  binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent