There are several ways to kill stink bugs, as suggested by the search results:

1. Garlic spray: Garlic repels stink bugs and is a natural deterrent. Create your own garlic spray by mixing two cups of water and four teaspoons of garlic powder. Spray the solution around windows, doors, and other entry points to your home.

2. Soapy water: Stink bugs wont drown in plain water, but they dont last long in water with a little dish soap. Fill a wide-mouth jar with soapy water (add some vinegar for extra killing power), move it into position beneath a stink bug, and most often it will drop right in. Alternatively, you can use a plastic cup and tap them in, then flush them. If you have a big infestation, you can buy a small wet/dry vac and put the soapy water in there.

3. Vacuum: Stink bugs crawl very slowly, which makes them easy to kill. Use an insect-trapping vacuum or similar bug zapper to remove them without smushing them or causing distress. Once you’ve sucked up the bugs, remove the bag and put it in the outdoor trash.

4. Pesticides: Common chemical sprays contain deltamethrin, a pesticide known to kill stink bugs, and can be used near common entry points or around windows or other spots where the bugs like to congregate. However, it is recommended to try a lower toxicity product first and read the label before buying.

It is important to note that killing or vacuuming stink bugs may release a foul odor, which will not attract other bugs. Prevention is also key to avoid stink bugs from getting inside your house. Seal up any cracks around the house where stink bugs can enter, check for broken screens, and apply fast-drying, fume- and stain-free insect barriers around windows, doorways, and other entry points to your home.