I just opened my box from the Labor Day sale (yep, I`m slow). I wanted to see if McKee`s new iron remover smelled better than Iron-X. When I unscrewed the cap I noticed something strange, the seal had been eaten through! No real cause for concern, but if you store your bottles on the side or one gets knocked over make sure the cap is really tight. The stuff still stinks like crazy, but not as bad as Iron-X. You definitely don`t want it leaking out inside your house and since it ate through the plastic seal you should be careful to rinse all plastic/rubber trim pieces extremely well. I hope this warning saves someone from discovering this the hard way.