Hi there! Thanks for the review. We are sorry that your Patio Shield Mosquito Repellent is not working to our quality standards, but we can hopefully help! We’ve got thousands of happy users to date, and have tested it extensively in extreme buggy conditions before we put our name on it. This product is fueled by butane which means it starts very much like a gas grill does. Turn the valve on, wait 5 seconds, then click “start”. It might take a few times like it takes a few times to get a grill going! You can always contact us at service@thermacell.net or 1-866-753-3837 with questions or concerns. There is a 100% Satisfaction Guarantee on all Thermacell products.

Thanks for your review and we are sorry Thermacell isn't meeting your expectations. Please contact us at service@thermacell.net or 1-866-753-3837 and we'll make this right with a replacement or refund (receipt required for refund). All Thermacell products come with a 100% Satisfaction Guarantee. Before you reach out, we would suggest trying two things: 1) Please ensure you see a small light through the view hole to ensure the device is on. 2) If your device will not turn on, please let the fuel flow for 2 minutes without pressing start. This can purge any dust or debris that may have settled inside of the device. If this doesn't solve the problem, please contact us.

Thanks for your feedback! We will be sure to share this feedback with our engineering team.