I do check all of mine from Jackel. I wasn't at first but then I had one come back and even though it was a good friend of mine that had bought it was like you said embarrassing. So I started checking at that point. I'm sure Jackel started getting quite a few complaints because I started receiving the warmers with a marking that they had been tested. But I still check each one as soon as they come in with or without the tested marking. The majority of the booths in the craft shop where we sell our products is mainly primitive items so that's another reason for me to change things up. I have found some items at Crazy Mountain, Harvest Scents, and Candle Warmers.com that I'm most likely going to try out. If any one has any input on those company's products I would love to hear your thoughts.