We\u00a0always remember to\u00a0check the expiration date of\u00a0milk, and we\u00a0know how long we\u00a0should keep our beauty products. Unfortunately, we\u00a0don\u2019t pay attention to\u00a0items in\u00a0our house that surround\u00a0us longer than they actually should. We\u00a0advise you to\u00a0start checking expiration dates...and not just the stuff in\u00a0your fridge! 1.\u00a0Fire Extinguishers Antos777 \/ Getty Images Most fire extinguishers don't expire for\u00a0five to 15 years, depending on the\u00a0type, but things like cracks in the hose and the pressure can affect how well they work. Solution:\u00a0Check the pressure\u00a0in the gauge often, and make sure to\u00a0recharge\u00a0(aka refill) after any use. 2.\u00a0Car Seats Ryan Mcvay \/ Getty Images Because they are made from materials that expand and contract with age and temperature, and the car itself changes temperature so frequently, most car seats expire six to 10 years after their manufacture date, which should be stamped somewhere on the bottom or side. Previous damage or\u00a0car crashes\u00a0can also affect the safety of the seat, which is why it isn't a great idea to buy a used model. (For more info on buying or selling a seat, go\u00a0here.) Solution: Check for the expiration date on the individual model and don't buy used versions unless you know the history. If you're uncertain, there are\u00a0car seat inspection stations\u00a0that will check the seat for you. 3.\u00a0Mascara Adisa \/ Getty Images Bacteria (like the kind that causes pinkeye and other infections) can start to grow in an open mascara tube within\u00a0three months\u00a0of use. Plus, with lots of pumping, the product will begin to dry out around the same time. Some products even have a hidden\u00a0expiration date. Solution: Buy new mascara every couple of months, and don't share with anyone else. 4.\u00a0Loofahs Trinaestipo \/ Getty Images Sponges and natural loofahs can start to breed bacteria in just\u00a0a couple of weeks. Plastic mesh loofahs are safe a little longer, up to eight weeks. Solution:\u00a0Rinse and dry\u00a0all your loofahs after each use. Replace natural loofahs every couple weeks, and mesh ones every other month. 5.\u00a0Batteries Gilles Paire \/ Getty Images Batteries start to expire as soon as they're made, so the expiration date printed on them or the package is based on this and not when or how they're used. The shelf life differs between types and sizes of battery, as well as where they are stored. Solution: Store batteries in a dry, room-temperature location, and check the date. 6.\u00a0Smoke Detectors Tab1962 \/ Getty Images Smoke and carbon monoxide detectors can stop working\u00a0after 10 years, even if the batteries are replaced. Solution: Most should have the expiration or manufacture date listed somewhere on them, but if you move into a new home and don't know the age, it's safer just to replace them. 7.\u00a0Liquor Isabel Da Silva Azevedo Drouyer \/ Getty Images Unlike wine, which continues to age even in the bottle, unopened liquors will stay good indefinitely. But an opened bottle of liquor will begin to lose its taste and potency after\u00a0about a year. But unless you're a connoisseur, you probably won't notice a big difference until much later. Solution: Keep opened and unopened bottles in a cool place. 8.\u00a0Lotion Kasiam \/ Getty Images Lotions and moisturizers in a tube should be good for\u00a0a couple of years\u00a0when opened, and after that will start to dry out and lose their effectiveness. But lotion in a jar that you use your fingers to apply can become a breeding ground for bacteria\u00a0even sooner. Solution: Use clean hands to apply lotion, and toss after a year or so. 9.\u00a0Hydrogen Peroxide Jupiterimages \/ Getty Images When it's opened, hydrogen peroxide only lasts\u00a0a few months\u00a0before it becomes ineffective (aka turns to water). Unopened, it should be tossed after a year. You'll know when it's bad when it stops fizzing. Solution: Toss everything and get a new first aid kit every couple of months, especially if it's been used. 10.\u00a0Lipstick Top Photo Group \/ Getty Images Lipstick that's exposed to air starts to dry out and change consistency after around\u00a0two years. You should be able to tell by a change in smell and texture. Some products also have a hidden\u00a0expiration date. Solution: Past the expiration date or after two years, any lipstick that's been opened should be tossed out. It's also smart to give your lipsticks\u00a0a good cleaning\u00a0every once in a while. 11.\u00a0Insect Repellent Rene Drouyer \/ Getty Images Insect repellent loses effectiveness after around two years from the manufacture date, which should be marked on the bottle. Don't let the bugs win. Solution: Check the date before you buy to make sure it isn't already old, and get new spray every couple of years. 12.\u00a0Running Shoes Trinaestipo \/ Getty Images After around\u00a0250 miles of running, sneakers can start to lose their cushioning, which means more stress on your joints. Solution: For hard runners, get new shoes every 200 to 300 miles. For less strenuous users, replace your workout shoes every six months to a year. 13.\u00a0Disposable Razors Trinaestipo \/ Getty Images Sure, you know that disposable razors are supposed to be disposable. But do you know how often? To prevent\u00a0bacteria buildup\u00a0and razor burn, you should toss your razors\u00a0every week, or every three to four shaves. Solution: Get a new razor every week, and make sure to let it dry between uses. 14.\u00a0Bike Helmets Helder Almeida \/ Getty Images Like car seats, bike helmets can lose their safety effectiveness over\u00a0a couple of years\u00a0and after any kind of crash or trauma. Solution: Replace helmets if they've been damaged in any way, and otherwise replace every three to five years or based on manufacturer recommendations. 15.\u00a0Potatoes Joerg Mikus \/ Getty Images The common potato and other plants of the same nightshade family (like tomatoes and eggplants) contain traces of a toxic chemical called solanine that can be\u00a0very dangerous and even deadly. The toxin is\u00a0minimal\u00a0in raw, unspoiled potatoes, but if sprouted, overexposed to the sun, or stored near other vegetables that increase spoilage (like onions) for a long period of time, the concentration of this chemical can become harmful. When stored correctly, ripe potatoes should stay good for two to three months. Solution: Don't eat green (unripe) or sprouted (overripe) potatoes; store potatoes in a cool, dark place. 16.\u00a0Bleach (and Other Disinfectants) Lana Langlois \/ Getty Images Bleach loses some if its potency around\u00a0three months. This shouldn't be a problem for household laundry, but the disinfectant qualities fall below the\u00a0EPA standards\u00a0around this time, which means it isn't effective for cleaning. Solution: Toss your bleach every few months or so. Same goes for Lysol and other household disinfectants. 17.\u00a0Sunscreen Farakos \/ Getty Images According to the Mayo Clinic, most sunscreen works at full strength for\u00a0around three years. Solution: Throw out sunscreen past the listed expiration date. If it doesn't have a date on the bottle, just note the day of purchase and toss after a few years. 18.\u00a0Power Strips and Surge Protectors Helder Almeida \/ Getty Images Cheap power strips or ones that have been overworked can be a\u00a0fire hazard, and use a lot of energy in your house. Even good-quality surge protectors are only designed to last for a certain amount of joules, which is the amount of excess electrical surges they absorb. Neither products typically come with an expiration date, but the product warranty is a good way to gauge how old they are. Solution: Only buy surge protectors and power strips with a\u00a0UL\u00a0or\u00a0OSHA\u00a0rating, and if they start to get discolored or hot to the touch, get a new one. It's generally a good idea to replace them every couple of years just to keep you (and your electronics) safe. 19.\u00a0Spices Svetl \/ Getty Images Dried spices often last for two to three years, but it depends on the kind, how they were dried, and how they are stored. Solution: Refer to\u00a0this chart\u00a0of how long different spices last. Credits:\u00a0buzzfeed.com Share this story on Facebook with your friends.