Has anybody heard of plastic bags filled with water keeping flies away? A co-worker of mine just came in and told me that when he went home from work last week, there was a plastic bag hanging on his porch filled with water. He thought someone had given him a fish or something but no. He went inside and asked his wife what the bag was. She told him that she had heard that they keep flies away. He has had a problem with cats "going" under his porch and a lot of flies. He claims that after a week there are no flies. Supposedly, the fly either thinks it's a hornets nest, or the reflection of the water disturbs them. Pest Control
