More than 9,000 Amazon shoppers have bought and given a 5-star rating to the Govee WiFi water sensor, which is currently 33% off — a far cry from the cost of water damage. Here’s how it works: First, you download the Govee water sensor app. After the gateway is paired to your WiFi and you’re all set up in the app, you’re good to go. That way, you’ll know if a leak occurred even if you aren’t home. Bottom line: This useful tool can help detect leaks, especially during heavy rain and icy winter storms, and it's 33% off.