First, take your bowl and pour some Mountain Dew into it. It doesn't need to fill it, but should be at least half of your pinky finger deep.
Carefully pour the dish soap over the Mountain Dew so it covers the entire top and makes a layer of soap
The Mountain Dew attracts the bees, because it's sweet. When they land in it, the soap partially traps them, leaving them to drown.
You don't have to change this very often, once or twice a day. It's ok if there are 30 bees in it, more will still keep coming.