Step #1 mix ingredients in a spray bottle; squirt on slugs.
Step #2 Reader Mary Jo Forbus of Arlington, WA wrote: "A few squirts are all it takes; they die right before your eyes, a very gratifying sight! The mixture is harmless to soil & plants.
Step #3 I keep my spray bottle nearby when gardening & check the garden twice a day, once early in the morning & again late in the evening.
Step #4 " "The In Basket: Letters from Our Readers" in "The Herb Companion.