Instruct: Classify the given review into positive or negative sentiment.
Query: Good Idea, Not So Perfect

Pigeons and other large birds love to drink from our spa. Unfortunately they leave behind a huge mess. We thought the "Scarecrow" would be the perfect solution--not so! The birds fly to our spa without any problems. However, when we walk by at 20 to 30 feet away, the sensor is triggered and we get wet. I would like to know how the manufacturer got the "Scarecrow" to sense the birds! It has no problem sensing children and adults.