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 $80, you get exterior window cleaning for up to 40 panes from Quick Draw Window Cleaning (a $160 value).

Quick Draw's window wizards cleanse dingy panes with environmentally friendly products, leaving glass glistening and spot-free. Each specialist wields FDA-approved, 100 percent biodegradable cleaning product, which safely shines windows without harsh chemicals in order to protect the environment, home dwellers, and allergy-prone curtains. Households with hard-to-reach windows need not fear, either, as the cleaners stretch and maneuver their way to clear up cloudy panes wherever they may be, letting in light to make sunnier sills and cheerier bamboo plants.