Clean Your Furnace
Change your furnace filter monthly. This helps in making your home more energy efficient, and retains your air cleaner. And don't overlook to look at the furnace itself. If it's coated in dust and grime, or if there are dust bunnies circulating around underneath, ensure that you vacuum them up.
Deep Clean Your Floor covering and Floors
I don't know about you, but I live in Michigan and my floors get trashed in the winter. Salt collects in between every carpet fibers, and the hardwood floors take on an unpleasant whitish sheen from melting salt water. To combat this, take the right time to steam clean your floor covering and scrub the floors. If you don't have a place for snowy boots and shoes, put out a couple of cookie sheets (the kind with the raised edge) for them to drain by the door. This will help keep that mess off the floors.
Homes get very dusty in the winter because the fresh air is so warm and dry. Dust your home's surfaces from top to bottom to help keep the dust to a manageable level. Don't forget ceiling enthusiast blades, the tops of windowpane moldings, and the tops of textbooks - all of which are often overlooked and will collect dust easily.  Also, give your lighting fixtures a good dusting. Dust easily collects on them during the winter too, and will make your indoor light look dingy. This will make a big difference in brightening items up. Many people also opt to get their home's atmosphere ducts professionally cleaned. This will not only reduce the quantity of dust drastically, germs and allergens floating around, but it may also assist your furnace run more efficiently.
Clean the Windows
For those who have a fireplace or burn off candles, your windows likely sport a thin film of soot on the inside, which can block precious sun. Give all your windows a good wipe down. I use vinegar mixed with water, and it works great.
Clean the Kitchen Ceiling
Think I'm kidding here? Your kitchen ceiling likely has a film of funk on it without you realizing it, mainly from all the moisture, fumes and smoke resulting from cooking. The same goes for the walls, especially those around the stove. Mix a small amount of slight dish soap in a bucket of hot water and lightly scrub with a sponge, using only a minimum quantity of water (not enough to drip). Of course, if you notice any discoloration or streaking, stop immediately.
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