I was rearranging my cellar today and have 5 tins of rare and discontinued Kingfisher. Two of the tins were rusting through and all 5 tops pulled right off. Every one of the tins had been compromised! 2 of the tins went straight to the trash, the other 3 had little rust and were still moist so I jarred them. Just aggravated that all 5 seals had popped. The tins sit in an air conditioned house and never get touched. They were from around 2010. I don't trust the small rectangular tins now. Samuel Gawith tins seem to hold there seal but the small rectangular tins were all compromised after 7 years. Any experiences with compromised tins? To be honest the only ones I trust are the pull tops from Mcclleland and C&D.