Every fall, we get mold growing on the siding of our house, so last October, I cleaned a 4 ft. x 4 ft. area with Thieves Household Cleaner. I sprayed it on, scrubbed it with a brush, waited five minutes, and sprayed it down with the hose. I showed my husband how clean it was, but he still chose to clean the rest of the side of the house with bleach. This October, I looked at that side of the house. Again, the seasonal mold is all over the siding – except for the 4 ft. x 4 ft. area I cleaned with Thieves last year!