Remove Weeds and Obstructions
Your first step will be to immediately remove the weeds from your garden, since the stink bugs will try to hide amongst them and camouflage. They can also hide under and around lawn ornaments, so make sure to check those as well.
Homemade Repellent
If removing weeds doesn’t help, you can try using a homemade bug repellant. Kaolin clay solution along with a few gallons of water and 15 ml of dish soap mixed together and placed in a spray bottle can help. Just spray all over the place and see how effective it can be.