I started with a water hose. Don't work at all. In fact, I think they used the water to fill up little hot tubs and have a Mole Orgy.

Then I switched to scissor traps. Somewhat effective, but too frustrating when they miss and they take too long.

Then I tried the poison smoke bombs. Not just one or two, but a whole pack or two at once.

Haven't had a mole in a couple years. I think my yard must look like Srebrenica a few inches down.