Not really, more human error making sure the flap was lined up and firmly closed, then anything to do with manufacturer/product at this time. . . However, I do hear you, IMO - after awhile, like everything else, pretty sure they can/will "wear" out as you mentioned . . . Maybe even "stretch" if people are not careful opening the flap . . . Guess we'll just have to wait and see . . . Just Sayin' . . .
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Thanks. Same here. No issues yet, but I'm very careful when refilling my Sceptres and Z tanks. I wish innokin would offer spare plugs for sale. I even mentioned it to Phil some time ago and he said he'd contact them, but so far, no luck.

