 Now, there's a couple ways to do it. One, you can buy your own indoor air quality tester. They make these things. You can get them online. There's good ones out there. You can move them around your house. It will tell you what the particulates are, what chemicals you've got for VOCs that are out there. It'll tell you if you've got too high a humidity. It'll give you some certain things. It'll give you a basic test.