How frequently you need to sanitize your cage depends on a number of factors including the size of the cage, the size of your birds, the number of birds you have, and how much time daily your birds are in the cage. Find a cleaning schedule that meets the needs of your specific set-up. Smaller cages with individual birds may only need to be sanitized once a month, especially if the bird is regularly let out of the cage. Large cages for large birds or cages for multiple birds should be sanitized weekly. Move your bird into a safe area such as an alternate cage and take all toys and accessories out of the cage to wash as you would for a daily washing. Remove the old liner and leave the cage bare. It is important to keep your bird in an area free from any exposure to fumes or excess product while you are cleaning your cage. Remember to wash any dishes and cage accessories in hot, soapy water before returning them to the clean cage. Remove debris and droppings from the cage using a pet-friendly soap or washing detergent and a scrubbing pad. Scrape them off of any of the cage surfaces, as well as off of perches and toys. Sandpaper can be useful in removing stubborn debris from wooden perches or toys. Use hot, soapy water to wash down the cage completely, then rinse thoroughly removing all soap and suds. This may be manageable in a sink for smaller cages, but larger cages may require a shower or use of a hose outdoors. An animal-safe dish soap or detergent is sufficient for this stage in the cleaning process. For better results disinfecting, use a clean towel to lightly dry the cage and soak up any excess water pooling around the cage's surfaces. Once the cage has been washed, spray the cage from top to bottom with a cage disinfectant spray. Disinfectant sprays meant specifically for bird cages may be bought online or purchased at a local pet or bird specialty store. Rinse the cage thoroughly with water and allow to air-dry completely before returning the bird. Some people opt to use a vinegar cleaning solution of one part distilled white vinegar and two parts water. Another homemade solution is three cups hot water, three tablespoons baking soda, and three tablespoons lemon juice. If you do not have the means to spray the disinfectant on the cage, thoroughly wipe down every surface with a clean towel soaked in the disinfectant solution. Remember to use protective gloves whenever handling the disinfectant. Once the cage has been sanitized, rinsed, and dried you are ready to replace all dry perches, toys, dishes, and other cage components. Place in the clean cage lining and make sure the apron and surrounding area are clean and free of debris before allowing your bird back in. Do not put wet or unrinsed components back in the cage, as these may cause harm to your bird or otherwise hinder their movement and access to parts of the cage.
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One-sentence summary -- Pick a cleaning schedule. Remove everything. Scrape away debris and droppings. Wash the cage. Disinfect the cage. Refill the cage.

Article: Keep the new cat in a separate room so the other cats can smell her through the door. You can use your bathroom if you don't have a spare room. Give the established cat something with the new cat's scent on it to sleep on. The ideal object is a T shirt with your scent on it that the new cat has sat on. This uses your scent as a "intermediary" and gives the established cat a gentle introduction. It may take a few days for your cats to not freak out or avoid your new cat's bedding. But over time, they should start to get used to the new scent. As a general rule, it is usually best to introduce a new cat when your existing cat is young. This will allow the two cats to get to know each other over a long period of time and hopefully bond as they grow. If you are planning to get a second cat or to add another cat to your household, it's important that you ensure they get along by introducing them properly. This means letting the cats see each other before they touch each other or interact. Consider placing the new cat in a cat carrier and placing this on the floor for the existing cat to sniff around and investigate, without the threat of being chased by the new cat. Alternatively, use a baby gate that is at least 36 inches high. Place it in the doorway of the new cat's room so she stays in her room and does not interact with your existing cat(s). Allow the cats to get a look at each other. Then, praise and reward both of them with a treat if there is no attacking or signs of aggression like hissing. Make sure the cats look at each other five to ten times a row, two to three times a day. Before you allow the cats to physically interact with each other, you need to ensure they have grown used to each other by smell and by sight. They should seem relaxed and calm when they look at each other and be okay with being in each other's presence for an extended period of time. If either cat starts to hiss, growl, or seem uncomfortable, move them out of each other's sight. Keep the baby gate door closed to the cats cannot interact with each other. Always quit while you're ahead and don't force the cats to get along. Patience is key as it may take some time for your cats to accept each other. Once your cats seem comfortable looking and smelling each other, you can start to encourage them to interact. Use a fishing rod type toy to play with the cats at the same time. You should also give each cat her own toy to play with. This will help the cats to associate being around each other with play time. If one cat starts to act aggressive, use the fishing rod toy to distract and redirect the cat. However, if both cats display any aggression or tension, separate the cats and return them to their separate spaces. You should never leave the cats alone to play until they seem comfortable and accepting of each other. If the cats play well together, reward them both with treats and praise. It's important to always reward both cats so they understand they are equal and there is no preferential treatment.
Question: What is a summary of what this article is about?
Allow the cats to smell each other before meeting. Let the cats observe each other before they physically meet. Pay attention to the body language of both cats. Play with the cats together.