Q: Ammonia is gentle enough that it won't remove the brass-plating, but strong enough that it will remove much of the grime. Use a soft cloth to apply the ammonia to the brass. Rinse it off thoroughly. Another option for heavier tarnish (once you've cleaned the item with soap and water, plus dried it) is a brass cleaner that is designed to be used on brass-plated items. Rub it in with a soft cloth, and wash it off with warm water. Test the cleaner first in a hidden area. Once you've cleaned the item and rinsed off any excess cleaner, always take the time to dry it thoroughly. You don't want to leave it wet, so use a soft cloth to dry it off.
A: Try ammonia. Use a mild brass cleaner meant for brass-plate. Always dry the item thoroughly.

Q: Green onions can be kept in water or soil at room temperature and they will continue to grow. If you want to keep them in water, you will need to find a glass or jar that is tall enough and heavy enough to keep them upright. If you want to keep the onions in soil, you will need a flower pot that will fit on your windowsill and that is at least 6 inches (15cm) deep. Green onions will last a long time stored in either water or soil on your windowsill. Deciding between the two is based mostly on personal preference. If you are using a glass, put 12 inches (2.55.1cm) of water in it. Like the refrigerator method, this allows the roots of the green onions to absorb water up into the plant. If you are using a pot, put at least 5 inches (13cm) of potting soil in it. This will allow the green onions to be planted deep enough to stand up on their own. Stick the root end of your green onions into your container of water. If you are keeping your onions in soil, stick the root end into the soil and then press the soil down around them to help the onions stand up. Green onions should be placed 2 inches (5.1cm) apart when planted in soil. In order for your green onions to continue growing, they need to be exposed to sunlight. Place the container or pot in a sunny spot that gets 6 to 7 hours of light every day. Having your green onions continue growing is a perk of storing them in the sunlight, as opposed to in the fridge. Green onions stored in the fridge will not continue growing. Typically, a sunny windowsill in your kitchen is a great place to store green onions or scallions. This makes it easy for you to remember to use them when you are cooking a meal. The green onions that you store outside of the refrigerator will need a bit of care. For green onions stored in water, be sure to switch out the water every few days. This will ensure that mold doesn't accumulate on the surface of the water. If your green onions are stored in soil, you should be sure to water the soil when it begins to dry out. Green onions should be kept in moist, but not overly wet, soil. Green onions that are stored outside of the refrigerator will continue growing. Clip off the new growth with scissors and keep the white root section intact. If you do this, the onions will continue to regrow indefinitely. If there are sections of the green part of the onion that go brown and shrivel, simply trim those off or leave them. Once you trim the greens the tips tend to brown and the onion will grow a whole new green sprout.
A: Pick out a container. Prepare your container. Place your onions in the water or soil. Place the container on your windowsill or in another sunny spot. Change out the water in the glass or water the soil every few days. Use the green onion tops and but keep the roots intact.

Q: If you have central air and heat, you'll need to find the main unit that conditions and circulates the air. This is usually in a basement, closet, or other out-of-the-way space. Try following any visible pipes or ducts through your house until it leads you to the HVAC unit, which will be a large metal contraption. On a HVAC unit, this will probably be somewhere between the air handler, a large box where the air is conditioned, and the plenum, another metal box located next to the unit itself. On a window air conditioner, the filter slot should be behind the grill that faces into your house. The location of the filter slot can vary from one unit to the next, but it should look like a long, thin opening with a removable cover. If you can't find a filter slot on your HVAC unit, try looking in the vents that blow air into your rooms. Some systems have filters in the return air vents themselves, although this is usually only true of systems with 2 or fewer vents. To avoid hurting the machinery or yourself, you'll want the unit to be off when you change the air filter. This will also keep any dust or particles from getting into the machinery while the filter is removed. The filter should slide out easily. Be careful when removing it, as it may be covered in dirt and dust that could come loose and make a mess if handled too roughly. If the filter doesn't come out easily, you can attach a folded tab of duct tape to the side of the new air filter to make an easy-pull handle for next time. The old filter can be thrown in the trash. You may want to carry it to the trash in a garbage bag to keep it from shedding dust and dirt on the way. It should slide in the empty slot with little to no resistance. The filter should have an arrow on the side that indicates the direction of the airflow. Make sure this arrow points in the same direction the old filter did, which will be towards the ductwork and the unit's blower. If you notice any gaps or other signs that the filter does not fit correctly, remove it and put the old filter back in temporarily. You may have the wrong size of filter, in which case you should double check which kind you should have and buy a new one. It's also possible that your new filter was somehow damaged and misshapen. Look at it closely to see if you can detect any damage, and if so, return it to the store and buy another. If any dust or dirt was shaken off the old filter when it was removed, be sure to clean it up. Use a rag or vacuum to remove as much of the dust as possible. It should run the same as it did before, or else have slightly better air pressure. If anything sounds or smells strange, or if the system isn't running at all, call a HVAC technician. This will help you keep track of how often you're changing the filter, and ensure that you remember when it's due for a check. Make a note with your phone or computer, or write it down somewhere that will be easy to keep track of.
A:
Locate your HVAC unit if you have central air. Look for an air filter slot in your unit. Turn your unit off. Remove the old filter. Insert the new air filter. Check for any gaps around the filter once it's in. Clean off any residual dust with a rag or vacuum. Turn the unit on to make sure it's still running well. Make a note of when you replaced the filter.