Moles are 6- to 8-inch-long mammals that live underground and feed on insects, both beneficial and harmful, such as earthworms and grubs. They dig a vast network of tunnels underground that appear as tiny mountains or mounds of dirt on the surface of the soil. These mounds not only look unpleasant and unsightly but ruin lawn grass because they separate the roots from the soil. Although moles do not actually feed on grass, killing them becomes necessary to maintain the appearance and health of your lawn.
Walk through your lawn wearing heavy boots and notice all possible dirt mounds. Stomp on them so that the soil falls back into the tunnels and seals them. Moles only cave-in tunnels where they live, so check the lawn the next morning to determine where a mound is formed again and get an idea of where moles are most active.
Roughly measure the size of the mole trap and dig a hole around one of the mounds of dirt with a shovel. Level the hole's base with your hand or a length of 4-by-4 board so that it is even and the trap rests in it level with the soil.
Place the trap in the hole carefully. Make sure the trigger plate rests over the base evenly, and make any adjustments by removing soil if necessary. Add soil around the trap to camouflage it so that the mole steps on the trigger plate when digging a hole.
Check the trap the next morning to see whether a mole has been caught. Remove some soil around the trap to uncover it. Wearing gloves, discard the dead mole appropriately and move the trap to another mound if you notice other moles around the lawn.
Sprinkle some cat litter or human hair into molehills to chase the moles away as opposed to killing them. Both of these act as a repellent and deter moles, as they do not like the scent.
Douse the molehill with water to chase these pests away. Run a garden hose and let it soak the hole to drive moles out of that area.