I just bought a bottle of Grapefruit seed extract to preserve some ointments I made. In the instructions, they mention making a fruit and vegetable wash. I believe you can either soak the fruits and veggies in the sink with Grapefruit-Seed-Extract added to the soak water or make up a diluted solution of Grapefruit-Seed-Extract and water and spray it on the fruits and veggies. It's relatively inexpensive, about $9.95 per bottle, and you only use a few drops at a time.