Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to use home remedies to get rid of gnats [title] Let infested soil dry out. [step] Allow the top 2 inches (5 cm) of soil to dry out completely before watering a gnat-ridden plant again. [substeps] Eggs are usually laid in damp, over-watered plants, and gnat larvae need to develop in moist organic material.

Ending1: [title] Slice the gnat-infested soil out with a round knife. [step] Do this carefully with enough force to break the sack. Ending2: Wait for the soil to dry out after watering to check if the soil is dry out properly. [title] Begin by taking a small amount of diatomaceous earth (tsp). Ending3: Keep the soil moist and uncovered after watering, though, or the gnat-infested plants can stay up roots longer. [title] Insecticides can be fatal to gnat larvae, and can permanently encourage disease. Ending4: Eggs and larvae will dry out and die if exposed to dry conditions. The infested plant may show early signs of withering, but this is unavoidable.

Answer format: ending1/ending2/ending3/ending4