Unwashed windows accumulate layers of grime that can build up and block out the sun, causing light-hungry houseplants to get their fix from TV sets and birthday cakes. Keep the planted masses happy with today's Groupon to Alpine Window Washing, serving Utah County, Park City, Salt Lake City, Heber, and Midway. Choose from the following options:

• For $20, you get $40 worth of window cleaning.
• For $69, you get a single-story (up to 2,500 square feet) interior or exterior residential window cleaning (up to a $140 value).
For $120, you get a two-story (up to 3,200 square feet) interior or exterior residential window cleaning (up to a $240 value).

Alpine Window Washing’s squeegee slingers free each home’s delicate see-through bits from dust and debris. Experienced window technicians put spotty panes on notice during a complimentary estimate, taking into account factors such as home size and job complexity before scheduling a future appointment. Although estimates vary, $40 of window washing typically includes the thorough scouring of a house’s frontal exterior, or one meticulous burnishing of stained-glass retellings of Moby Dick. Depending on domicile size, window interiors may also catch a sudsy scrub-down.

Eliminate dirt hiding on hard-to-reach panes with detailed interior or exterior all-window cleanings of single-story or two-story abodes, as technicians primp houses before an upcoming parade of homes or the birth of a new shed. As a sponsor of the Utah Valley Marathon, Alpine Window Washing brushes up community morale in addition to resident fenestrae.

Though Alpine Window Washing sometimes features a discounted price online, this Groupon still offers the best deal available.