According to the search results, there are several ways to kill bird mites instantly. Here are some options:

• Chemical insecticides: A chemical insecticide, such as permethrin, ß-cyfluthrin, or deltamethrin, will kill bird mites on contact.
• Steri-Fab: Steri-Fab is a spray insecticide that can be sprayed on couches, chairs, and other upholstered furniture where bird mites may be present. It is labeled for mites and also works as a sterilizer, killing bacteria and viruses.
• Vacuuming: Frequently vacuuming infested rooms will dramatically reduce the number of mites. Make sure carpets, rugs, curtains, and furniture are all thoroughly vacuumed. Vacuum bags should be immediately removed from the vacuum cleaner and sealed in a bag and put in the freezer. This will kill the mites. If your vacuum cleaner does not use bags, just empty the collection container into a bag then place it in the freezer.
• Professional pest management service: Another option is to hire a professional pest management service to treat your home.

It is important to note that identifying the source of the infestation and removing it is also crucial in getting rid of bird mites. This can include removing old nests or dead birds, as well as vacuuming and washing fabric items located in the infested areas.