If you cannot trigger your camera using your Splash, please check the following items.
1. If you have purchased a camera connection cable, please connect your Splash to your camera and set the last parameter (Trigger) on the app to Camera. In this case, the Splash will trigger your camera after dropping water.
2. Set your lens to Manual Focus
3. Set your camera to MF instead of AF
4. Visit the Setting section in the app and try longer Pulse Length values
If you still have the issue, please take a short video and share with us for our investigation.