By Cary Teller

Homes cost a lot of money to maintain. But are you spending extra money unnecessarily on upkeep? Here are the 10 most expensive mistakes you could be making in your home.

1. Using Traditional Light bulbs

If you still have incandescent light bulbs in your home, you could be throwing a lot of money away every month on inflated electric bills. Over its life span, an incandescent bulb can use $180 worth of electricity. A CFL will only use $41 worth of electricity over the same time period. Even better is the LED bulb, which only uses $30 per bulb. Think what replacing every light bulb in your home could do to your home's bottom line.

2. Ignoring a Leaky Faucet

A leaky faucet that drips one drop per second can waste more than 3,000 gallons per year, which is enough water to take more than 180 showers. Some of us live in areas where water is plentiful, but for those of us in areas plagued with drought, this could be costing you a fortune. Fix or replace your leaky faucet and save a ton on your water bill.

3. Using the Wrong Air Filter Size

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