I've been noticing with some of my 6ml bottles after they are exhausted and I go to clean them out that the insides of the bottles look a bit, well, melted or like liquid has made them leach. Has anyone else notices this, it is a bit concerning to me. I made a couple of Syringe type tanks that work great and don't seem to have this with that kind of plastic but with the 6ml bottles I'm getting it sometimes. Anyone have any thoughts on this topic ????
