Where do I start with the fail that is this kit? Sampling is easy yet useless due to too many variables and no real control. The media used is designed to grow most types of fungi however some do not perform well in this type of media or take too long (analysis is performed prior to their ability to even colonize the media). Another serious defect is that there is no way to determine how much area was sampled. Imagine taking a traffic survey to see if more lanes are needed on a freeway and the only result is “there were 100 cars”. Great, now is that in 50 yards? Definite problem if it’s only 3 lanes. How about 100 cars per hour on a 6 lane highway? Not even close to a problem. Now you’ve wasted time and money on useless data that could have also been contaminated. Here’s another scenario, the fungal growth in your house is wet. What happens to dirt when it’s wet? Nothing, just like the usefulness of the home test kit. Did you walk through the grass on your way in to test? Might have spiked your results. Fresh fruit or seasoned firewood close by? Open trash can? I’m sure by now you can see the failure of this product. I can tell you that every house has fungi present.