I use a small transparent plastic container that I put over the subject. It moves around inside and occasionally comes to a standstill/rest on the plate (black acrylic material), at which point I (very gently) remove the container, and take the opportunity to fire off a few shots. As soon as it starts moving, I put the container back. I found this one in my house, and released it after about 15 minutes/20 shots. Many insects will settle down after a few minutes, allowing you to take the shot.