Caution: Always use caution when applying recipes to the garden. Wear protective eye gear and gloves. Try to spray when it's not windy!
All Growing-Season Remedy
1 cup of liquid castile soap or baby shampoo
1 cup antiseptic mouthwash
Good Old Foil Remedy
This sounds crazy, but try it. Put some aluminum foil (shiny side up) on the ground around your plants. Weigh it down with a couple of rocks. The light glaring from the foil stops insects from landing on your plants. (especially moths and aphids) If you're having avery hot summer, be careful, as this could scorch plant leaves.
Take a liter of water. Add 1 tablespoon of very mild liquid soap (like castile) or and 5 cloves of garlic (sliced). Shake and put it in a hand-held spray bottle. Spray on plants.