I don't know if I should be expecting a few "duhs" but the room where I cellar my tobacco has a tobacco odor. I like it but if the tins are "sealed", technically there shouldn't be a tobacco odor, correct? I have a mix of tin types and on the order of ~40 lbs cellared. Every european tin I pick up and give the sniff test has a tobacco smell and in line with type of blend. Is this normal? I believe all the tins are sealed but how do I know for sure?