If they're not cleaned every few days, your windows will turn black and begin emitting a high-pitched scream that makes dogs pregnant. Prevent a neighborhood outbreak of puppies with today's Groupon: for $45, you get a 25-pane exterior window washing from Russel Williams Window Cleaning (a $90 value).

Russel Williams Window Cleaning's highly trained crew of sudsers keeps household portals polished with meticulous window- washing services. Subject windowpanes to a lengthy scrubdown, where washers move gracefully from pane to pane like a squad of delicate acrobats, washing each surface twice, clearing away any dried paint, varnish, bug-impact residue, and glass-colored chameleons. Window washers cleanse glass without the aid of harsh chemicals and inspect their work thoroughly upon completion, ensuring the absence of unsightly streak marks or soapstains.